Implementing caching can be straightforward or complex, depending on your needs:
HTTP Headers: Use headers like 'Cache-Control' and 'Expires' to instruct the browser on how long to cache specific assets. ETags: These are unique identifiers that help in validating whether a resource in the cache is still up-to-date. CDN Integration: Utilize a CDN to cache your assets at the network edge. This can be as simple as setting up an account with a CDN provider and configuring your emails to use the CDN URLs for your assets.