info .htaccess

@islp WP-Optimize edit .htaccess file to add following GZIP and caching rules

# BEGIN WP-Optimize Gzip compression
<IfModule mod_filter.c>
	<IfModule mod_deflate.c>
# Compress HTML, CSS, JavaScript, Text, XML and fonts
		AddType application/vnd.ms-fontobject .eot
		AddType font/ttf .ttf
		AddType font/otf .otf
		AddType font/x-woff .woff
		AddType image/svg+xml .svg
		
		AddOutputFilterByType DEFLATE application/javascript
		AddOutputFilterByType DEFLATE application/rss+xml
		AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
		AddOutputFilterByType DEFLATE application/x-font
		AddOutputFilterByType DEFLATE application/x-font-opentype
		AddOutputFilterByType DEFLATE application/x-font-otf
		AddOutputFilterByType DEFLATE application/x-font-truetype
		AddOutputFilterByType DEFLATE application/x-font-ttf
		AddOutputFilterByType DEFLATE application/x-font-woff
		AddOutputFilterByType DEFLATE application/x-javascript
		AddOutputFilterByType DEFLATE application/xhtml+xml
		AddOutputFilterByType DEFLATE application/xml
		AddOutputFilterByType DEFLATE font/opentype
		AddOutputFilterByType DEFLATE font/otf
		AddOutputFilterByType DEFLATE font/ttf
		AddOutputFilterByType DEFLATE font/woff
		AddOutputFilterByType DEFLATE image/svg+xml
		AddOutputFilterByType DEFLATE image/x-icon
		AddOutputFilterByType DEFLATE text/css
		AddOutputFilterByType DEFLATE text/html
		AddOutputFilterByType DEFLATE text/javascript
		AddOutputFilterByType DEFLATE text/plain
		AddOutputFilterByType DEFLATE text/xml
		
# Remove browser bugs (only needed for really old browsers)
		BrowserMatch ^Mozilla/4 gzip-only-text/html
		BrowserMatch ^Mozilla/4\.0[678] no-gzip
		BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
		Header append Vary User-Agent
	</IfModule>
</IfModule>
# END WP-Optimize Gzip compression
# BEGIN WP-Optimize Browser Cache
<IfModule mod_expires.c>
	ExpiresActive On
	ExpiresByType text/css "access 28 days"
	ExpiresByType text/html "access 28 days"
	ExpiresByType image/gif "access 28 days"
	ExpiresByType image/png "access 28 days"
	ExpiresByType image/jpg "access 28 days"
	ExpiresByType image/jpeg "access 28 days"
	ExpiresByType image/webp "access 28 days"
	ExpiresByType image/x-icon "access 28 days"
	ExpiresByType application/pdf "access 28 days"
	ExpiresByType application/javascript "access 28 days"
	ExpiresByType text/x-javascript "access 28 days"
	ExpiresByType application/x-shockwave-flash "access 28 days"
	ExpiresDefault "access 28 days"
</IfModule>

<IfModule mod_headers.c>
	<filesMatch "\.(ico|jpe?g|png|gif|webp|swf)$">
		Header set Cache-Control "public"
	</filesMatch>
	<filesMatch "\.(css)$">
		Header set Cache-Control "public"
	</filesMatch>
	<filesMatch "\.(js)$">
		Header set Cache-Control "private"
	</filesMatch>
	<filesMatch "\.(x?html?|php)$">
		Header set Cache-Control "private, must-revalidate"
	</filesMatch>
</IfModule>

#Disable ETag
FileETag None
# END WP-Optimize Browser Cache

If the rules are not added to .htaccess file then some features may not work as expected in WP-Optimize.

@bornforphp:

well, I have my own rules for the files cache too.
Anyway, thanks for your kind reply.