Gzip compression decreases the weight of a web page consistently, compressing all the elements in order to speed up their upload.
The Apache module concerning the compression is called mod_deflate and is available, by default, in all Keliweb hosting plans. To enable the module you can choose one of these options: using the graphic tool provided by cPanel (from KeliPro plan on) or enable the gzip compression by typing several rules in the .htaccess file.
In the first case, login to your cPanel control panel and, in the "Software" section, click on "Optimize website". Here, you can choose to compress the whole website or just several files. If the full compression causes any malfunctioning you can also choose a third option, to get a "lighter" compression.
Then, update settings to complete the operation.
Otherwise, if you want to enable gzip compression by typing several rules in the .htaccess file, located in your account's public_html, open the file via FTP using a text editor or via File Manager by typing the following rules:
<IfModule mod_deflate.c>
# Compress HTML, CSS, JavaScript, Text, XML and fonts
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-javascript
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE font/opentype
AddOutputFilterByType DEFLATE font/otf
AddOutputFilterByType DEFLATE font/ttf
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
</IfModule>
Save and refresh the file.
To check if the compression has been successfully processed use this tool online http://www.whatsmyip.org/http-compression-test/.