You will often noticed the Leverage browser caching warning while checking website performance tool such as pagespeed insight etc, in order to fix this issue by installing the wordpress cache plugins such as WP fastest cache OR total W3 Cache.
OR
You can insert Expire Headers code inside .htaccess file as follows:
1. Open .htaccess file from site root folder
2. Add below code after the end of the content
## EXPIRES HEADER CACHING ##
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType application/javascript "access 1 month"
ExpiresByType application/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 2 days"
## EXPIRES HEADER CACHING ##
Save the changes.
