Step 1: Login to the cPanel account.
Step 2: Select File Manager option under File section.
Step 3: Click settings option inr right top and check the boxes to view the hidden files in File Manager.
Step 4: Select the .htaccess file and select Edit and open the file.
Step 5: Update the below rules,  In order to reduce the load times of web pages by storing commonly used files from your website on your visitors browser

<IfModule mod_expires.c>
ExpiresActive on
ExpiresByType text/css "access plus 14 days"
ExpiresByType text/xml "access plus 0 seconds"
ExpiresByType text/javascript "access plus 14 days"
ExpiresByType application/x-javascript "access plus 14 days"
ExpiresByType image/ico "access plus 14 days"
ExpiresByType image/jpg "access plus 14 days"
ExpiresByType image/jpeg "access plus 14 days"
ExpiresByType image/gif "access plus 14 days"
ExpiresByType image/png "access plus 14 days"
ExpiresByType image/svg+xml "access plus 1 month"
ExpiresByType text/html "access plus 14 days"
ExpiresByType video/ogg "access plus 1 month"
ExpiresByType audio/ogg "access plus 1 month"
ExpiresByType video/mp4 "access plus 1 month"
ExpiresByType video/webm "access plus 1 month"
ExpiresByType application/x-font-woff "access plus 1 month"
ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
ExpiresByType application/xml "access plus 0 seconds"
ExpiresByType application/json "access plus 0 seconds"
ExpiresByType application/rss+xml "access plus 1 hour"
ExpiresByType application/atom+xml "access plus 1 hour"
</IfModule>
Step 6: Click Save changes button to completed the process.