If you want to have error pages on your site such as 404 page not found, you can do it as follows:
Log in to cPanel - File Manager - public_html
Create an ".htaccess" file (with all dots but make sure you already have one)
In that file, enter the following:
ErrorDocument 403 /403.html
ErrorDocument 404 /404.html
ErrorDocument 500 /500.html
Then in the pulic_html folder you create HTML pages such as 403.html, 404.html and 500.html and when a visitor tries to open a link that does not exist on your site, he will see your 404.html page.
Of course, you can take the visitor to an existing page for a non-existent page if you don't want the visitor to know that you have such pages.
ErrorDocument 404 /index.html
How do you go back to the beginning?
Simply delete the html pages and that's it.
