This feature helps you find where the text (strings) appears on your site, so you can translate it more easily. 
\t\t\t\t\t\t\t\t\t\t\tIt may slow down your site while it's running, so it's best to use it only during development. 
\t\t\t\t\t\t\t\t\t\t\tRemember to turn it off when your site goes live to keep things running smoothly.