Managed Hosting & Infrastructure
Managed WordPress Hosting
A hosting model where the provider handles WordPress-specific tasks — updates, security, backups, performance — rather than leaving them to the site owner. Managed hosting costs more than standard shared hosting but removes the operational burden of keeping WordPress healthy and secure.
CriticalWP context: Every CriticalWP plan is a managed WordPress environment. See managed WordPress hosting.
Dedicated Container
An isolated server environment allocated exclusively to one site or account. Resources — CPU, RAM, and storage — are not shared with other users on the same server. This ensures consistent performance regardless of what's happening elsewhere on the hosting network.
CriticalWP context: CriticalWP's managed WooCommerce plan runs in a dedicated container. Standard managed plans run on optimized shared infrastructure with resource guarantees.
Shared Hosting
A hosting model where many websites share the same physical server and its resources — CPU, RAM, and bandwidth. It's the cheapest option but the least reliable. When one site on the server experiences a traffic spike, every other site on that server can slow down or go offline.
Cloud Hosting
A hosting model where resources are distributed across a network of servers rather than a single machine. If one server in the cluster fails, others pick up the load automatically. Cloud hosting offers scalability — resources can be increased on demand — and better redundancy than single-server setups.
CDN (Content Delivery Network)
A globally distributed network of servers that delivers static assets — images, CSS, JavaScript, fonts — from the location geographically closest to the visitor. A visitor in Tokyo gets content served from a Tokyo edge node rather than a server in Dallas. Reduces page load times, reduces server load, and provides a layer of DDoS protection.
Cloudflare Enterprise
The top tier of Cloudflare's CDN and security platform. Includes advanced DDoS mitigation, enterprise-grade performance optimization, automatic SSL provisioning, and priority routing. Enterprise-tier features are typically only accessible through managed hosting providers that have a direct Cloudflare partnership.
CriticalWP context: All CriticalWP plans include Cloudflare Enterprise CDN.
Server-Side Caching
A performance technique where the server stores pre-rendered HTML versions of pages and serves them directly — without executing PHP or querying the database for each request. For a typical WordPress page, server-side caching reduces the number of database queries from dozens to zero. The result is dramatically faster load times and lower server resource usage.
Uptime
The percentage of time a website is accessible to visitors, measured over a rolling period. Expressed as a percentage: 99.9% uptime equals approximately 8.7 hours of downtime per year; 99.99% equals about 52 minutes. Most managed hosts publish uptime SLAs — the contractual guarantee of minimum availability.
DNS (Domain Name System)
The internet's address book. DNS translates human-readable domain names (criticalwp.com) into IP addresses (the numerical addresses servers actually use). When you migrate a site to a new host or point your domain to a new server, you update your DNS records. Changes propagate globally — a process called DNS propagation — over 24 to 48 hours.
CriticalWP context: CriticalWP provides DNS settings for all new sites. Clients can implement them independently or open a ticket for assisted setup.
SSL Certificate
A digital certificate that encrypts the connection between a visitor's browser and the web server, enabling HTTPS. Without SSL, browsers display "Not Secure" warnings, payment transactions cannot be processed, and Google treats the site as less trustworthy. SSL is a confirmed Google ranking signal and a requirement for any site handling user data or payments.
WordPress Core
WordPress Core
The base WordPress software — the PHP files, JavaScript, and database tables that make up the WordPress application itself, independent of any theme or plugin. WordPress Core is updated regularly to patch security vulnerabilities, fix bugs, and add new platform features. Keeping it current is one of the most important maintenance tasks on any WordPress site.
PHP Memory Limit
The maximum amount of server memory WordPress is permitted to use for a single page request. When a plugin or theme process exceeds this limit, WordPress throws a fatal error — typically a white screen or a "Allowed memory size exhausted" message. The default PHP memory limit is often 32MB or 64MB. Most managed hosting environments set it to 256MB or higher to accommodate modern plugins.
WordPress Multisite
A built-in WordPress feature that allows a single WordPress installation to run multiple websites from one codebase and one admin dashboard. Each site gets its own content, users, and settings, but shares themes, plugins, and hosting resources with the network. Commonly used by agencies managing large numbers of client sites or organizations running multiple sub-brands.
WordPress Theme
A collection of template files, stylesheets, JavaScript, and assets that control the visual design and layout of a WordPress site. Themes are installed separately from WordPress Core. Switching themes changes how the site looks without affecting the content stored in the database — though some page builders store design data that is theme-dependent.
WordPress Plugin
A self-contained package of PHP code that extends WordPress's default functionality. Plugins can add contact forms, SEO tools, ecommerce, security layers, analytics integrations, membership systems, and virtually anything else. Plugin conflicts — two plugins trying to do the same thing or incompatible code — are one of the most common sources of WordPress errors and site downtime.
wp-config.php
The primary WordPress configuration file, located in the WordPress root directory. It contains database credentials (name, username, password, host), authentication keys and salts, debug settings, and environment variables. It is one of the most sensitive files on a WordPress installation — incorrect edits can take the site offline, and it should never be publicly accessible.
.htaccess
A server-level configuration file used by Apache web servers. WordPress uses the .htaccess file to manage URL rewriting — the mechanism that makes clean permalink structures like /blog/post-name/ work instead of /?p=123. A missing or corrupted .htaccess file is a common cause of 404 errors on all pages except the homepage and 500 internal server errors.
WordPress Cron (WP-Cron)
WordPress's built-in task scheduler, used to run time-based tasks — publishing scheduled posts, sending email notifications, running backup jobs, and executing plugin maintenance routines. Unlike a true server cron job, WP-Cron is triggered by site visits rather than a system clock. On low-traffic sites, scheduled tasks may run late or not at all if no one visits the site at the scheduled time.
WooCommerce & Ecommerce
WooCommerce
The most widely used ecommerce plugin for WordPress, powering a significant portion of all online stores globally. WooCommerce adds product listings, shopping cart, checkout, payment gateway integration, inventory management, and order processing to any WordPress site. It is significantly more resource-intensive than a standard WordPress installation — dedicated hosting is recommended for any store expecting consistent traffic or handling real transactions.
CriticalWP context: See managed WooCommerce hosting for dedicated infrastructure built for WooCommerce stores.
Payment Gateway
A service that securely authorizes and processes payment transactions between a customer and a merchant. The gateway acts as the intermediary between the store, the customer's bank, and the merchant's bank — encrypting card data, verifying funds, and approving or declining the transaction. Common WordPress/WooCommerce gateways include Stripe, PayPal, Square, and Authorize.Net.
Cart Abandonment
The event where a shopper adds one or more products to an ecommerce cart but leaves the site without completing the purchase. Industry average cart abandonment rates hover around 70%. The most common causes are slow or broken checkout pages, unexpected costs revealed at checkout, a required account creation step, or a poor mobile experience.
Transaction Cutover
The process of switching a live ecommerce store from one hosting environment to another while the store continues processing orders. Done incorrectly, orders can be placed on the old server after the new server goes live, resulting in missed or duplicated orders. A proper transaction cutover requires precise DNS timing, database synchronization, and a defined freeze window — the period where no new orders are accepted during the final switch.
CriticalWP context: WooCommerce migrations to CriticalWP are handled as a separate flat-fee engagement specifically because of transaction cutover complexity. See managed WooCommerce.
SEO & GEO
Technical SEO
The discipline of optimizing a website's infrastructure — rather than its content — to improve visibility in search engines. Technical SEO covers site speed, crawlability, indexability, URL structure, schema markup, Core Web Vitals, mobile usability, and internal linking architecture. It is the foundation that content SEO is built on — strong content on a technically broken site will not rank.
Schema Markup
Structured data added to a webpage's HTML — typically formatted as JSON-LD in a <script> tag — that describes the page's content to search engines and AI systems in a machine-readable format. Schema can define what type of content a page contains (Article, Service, Person, Product), who created it, what entities it references, and how those entities relate to each other. It is the primary mechanism for communicating with AI search systems at a structural level.
E-E-A-T
Experience, Expertise, Authoritativeness, and Trustworthiness — Google's framework for evaluating content quality, used by Google's human Quality Raters. Experience refers to first-hand knowledge of the subject. Expertise is demonstrated depth in the topic area. Authoritativeness is recognition from peers and external sources. Trustworthiness is the foundation — accurate content, named authorship, and transparent business information. E-E-A-T is not a direct algorithmic ranking factor but strongly influences how Google's systems evaluate page quality.
AI Overview
A feature in Google Search that generates a summarized, AI-produced answer at the top of the search results page in response to a query. AI Overviews pull from pages Google has assessed as high-confidence sources and cite those sources directly. Structured, entity-rich content with clear authorship and defined relationships is prioritized for citation over generic content.
GEO (Generative Engine Optimization)
The emerging discipline of optimizing content and structured data to be retrieved and cited by AI-powered search engines and language models — including Google AI Overviews, ChatGPT, Perplexity, and others. GEO prioritizes entity clarity, structured markup, direct answer formats, and verifiable authorship over traditional keyword density and backlink volume. As AI-generated search summaries become the primary interface for many queries, GEO is becoming as important as traditional SEO.
Entity (SEO)
A uniquely identifiable and unambiguous person, place, organization, concept, or thing that a search engine or AI model can recognize and associate with related topics. Google's Knowledge Graph is built on entities and the relationships between them. Establishing a brand, person, or business as a known entity — through schema markup, SameAs attributes linking to external profiles, and consistent name/URL/description across the web — is foundational to modern SEO and GEO strategy.
Security
Security Hardening
The process of systematically reducing a website's attack surface by disabling unnecessary features, enforcing strict access controls, applying server-level protections, and eliminating common vulnerability points. On WordPress, hardening includes disabling the file editor, restricting login attempts, hiding version information, removing unused user roles, and enforcing two-factor authentication on admin accounts. Hardening is a proactive discipline — it reduces the probability of a successful attack before one is attempted.
Brute Force Attack
A category of cyberattack where an automated script attempts to gain unauthorized access to a system — typically the WordPress admin login — by systematically trying large numbers of username and password combinations. Brute force attacks are common, automated, and often run continuously against every exposed WordPress login page on the internet. Mitigated by rate limiting login attempts, enforcing strong passwords, changing the default login URL, and enabling two-factor authentication.