This tutorial shows how to enable and get a Clean URLs in Drupal 7.x.
The style of URLs using "?q=" can be hard to read, and may even prevent some search engines from indexing all the pages of your site. So we will show you how to remove this part from URLs.
Log in to Admin Panel, navigate to Configuration > Search and metadata > Clean URLs.
Check the Enable clean URLs checkbox, then click "Save configuration"
Check your site to see that you have now a clear URL without "?q=".
Feel free to check the detailed video tutorial below: