Joomla!™ Administration - Global Configuration
Enabling "Search engine friendly URL's" in your Joomla system would allow some search engines to better index your site. In order to do that please follow these steps:
Step 1: Enable SEO
Navigate to: Site -> Global Configuration -> SEO.
Then change Search Engine Friendly URL: to be Yes.
Please, [Save] the settings now.
Step 2: Enable mod_rewrite / Rename htaccess.txt file
If you want to use SEF for your Joomla installation you will have to enable Mod_Rewrite. Mod_rewrite is installed on SiteGround's servers and you can enable it for your account. In order to enable the rewrite rules for your SEO you will need to rename the htaccess.txt file in your Joomla installation directory to .htaccess. You can do this by using an FTP client or your cPanel -> File Manager section as shown on the image below:
Please, navigate to the folder of your account where the Joomla is installed and click the file name htaccess.txt. Then select "Rename" from the menu on the right, and rename it to .htaccess.
Step 3: Test the SEO functionality
Your Search Engine Friendly URL's should be enabled now. You can go to your site and try browsing through the menu links. Your URLs should now look like this:
Congratulations! You have successfully enabled the Search Engine Optmization module in Joomla!
Below, you can find more information about the other options in the Global configuration tab:
We do not recommend changing the default Database, Server, and Cache tabs, unless you know what you are doing. Any incorrect setting in these sections could render your Joomla-powered website to be inaccessible.