Enabling caching features file in Magento2

STEP 1:

Navigate to System > Cache Management

STEP 2:

Mark all checkboxes, select Enable from the drop-down box, and hit Submit:

Enabling Full Page Cache in Magento 2

STEP 1:

Navigate to Stores > Configuration (under Settings) > Advanced > System.

STEP 2:

Under “Full Page Cache”, you’ll find the Caching Application field. By default, it’s set to Built-in Cache. Change that to Varnish Cache (Recommended).

STEP 3:

Next, an additional settings screen named Varnish Configuration appears. There, you fill in whatever your hosting provider has provided you.