IP.Board google says leverage browser caching

Google's pagespeed insights was telling me to "leverage browser caching" and I have heard that pagespeed can now affect pageranking

I couldn't find anyway to get it to go away by changing up cache settings within adminCP

The way I got rid of it was to add the following to my .htaccess file - just wondering is there anything wrong with doing this?

## EXPIRES CACHING ##
<IfModule mod_expires.c>
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 text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##