When a user or any search bot visits a Magento website, the server provides a response if the page was changed since the last visit. If the content hasn’t changed, the page will be loaded from the browser cache, which positively impacts the page speed load and server speed. However, if the correct response isn’t set on the server, it won’t provide the information about changes and the content downloads from the server every time. Last-Modified Extension automatically configures both last-modified 304 and if modified since 200 responses.
- last modified 304 response
- if modified since 200 response