Hope this helps

Plain text has no formatting. Plain text typically is represented as looking very plain. It's often displayed using what's called a "mono-spaced" font - meaning that each character takes up the same space on the line

HTML started as the way to describe how web pages should look. It includes ways to specify formatting, colors, positioning, and some amount of layout. As email became more popular, people started wanting to make their messages "look" as nice as they felt web pages looked. They wanted that formatting, the ability to put in pictures, and the like.

The html part is where you add the spinning hearts and stuff....
Does this help?

Hope so

Colleen

PS. not a stupid question