You can create a custom error page so that if a visitor attempts to visit a page on your site that does not exist, instead of seeing a default 404 error they will see a message of your choice that can direct them to the proper page. 

Please note, if you have not yet pointed your domain to our Nameservers and would like to test your changes, custom error pages will not work properly through the temporary URL. Instead of using your temporary URL to test your site, you will want to make a hosts file modification instead.

First, log into your cPanel and select "Error pages" under the "Advanced" sub-header:

Next, select the Error Page that you want to edit.  In this example, we will edit the 404 Error page by clicking on it:

Now, we will put in our own information:

Once we have saved our changes, we can go check and make sure it worked in our browser: