how to use the same text style across my video without creating the same style from scratch

Hi friends,

I have a problem in Adobe After Effects which takes a lot of my time when I create videos. For example, I need to use a style for the text explainer across my video. When I copy and edit the text, it changes the previous text (original one). I tried doing pre-comps but still it takes a lot of time. How can I do it in an eseir and quicker way? 

How can I create a text style and use it in my videos... like a text explainer on a box 

Regards,

Hasib