Step 1: You can easily enable caching for your Drupal application from its administrative area > Configuration > Performance (in Development section).
Step 2: On the new page select:
(i) Cache pages for anonymous users
(ii) Cache blocks
(iii) and select the minimum and maximum lifetime of the cache as shown in the example below:
Step 3: Once you have set the caching settings click on the Save Configuration button at the bottom of the page to apply them.
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