Plugin

A plugin is a piece of software that adds specific functionality to an existing platform without requiring custom code. In website platforms like WordPress, plugins are used to add features like contact forms, SEO tools, security, and performance optimization. While plugins can extend functionality quickly, relying on too many creates compatibility issues, security vulnerabilities, and performance problems over time — a common reason WordPress sites slow down or break after updates.

See also: CMS · Technical SEO · Webflow · Craft CMS