Go to your WordPress Dashboard.
Navigate to Plugins > Add New.
Search for a plugin (e.g., "Yoast SEO").
Click Install Now, then Activate.
Deactivate: Temporarily turn off a plugin without deleting it.
Delete: Remove it completely from your site.
Update: Always keep plugins up to date for security and compatibility.
Tip: Only install plugins from trusted developers to avoid slowing down your site.