Whitelist/Blacklist IP Addresses (Apache) Allow or deny requests based upon the requesting IP address. Useful when a site is under maintenance or to block repeat offenders.
Add/Remove Trailing Slash (Apache) Add or remove the trailing slash in URLs to enforce consistent URL structure, good for SEO.
Serve Images from New Directory (Apache) Serve images from a new directory, whether by rewrite or redirect.
Remove File Extensions From URLs (Apache) Simplify URLs slightly by removing file extensions. Used to tidy up URLs a bit, not to 'cloak the technology in use'.
Redirect All HTTP Requests To HTTPS (Apache) Redirect all non-secure (HTTP) requests to use a secure (HTTPS) connection.
Enable GZip/DEFLATE Compression (Apache) Enable compressed responses using GZip or Deflate to reduce bandwidth and increase performance.
Redirect Default Document to Directory (Apache) Redirect all requests to default documents to their parent directory URL. Important SEO tactic to avoid duplicate content penalties.
Add Caching for Static Assets (Apache) Add caching directives that browsers will use to cache static assets on the client side.