In many ways, LaTex is similar to html or CSS.
Advantages over WYSIWYG:
- It lets you focus on your content without regard to its formatting. Cutting and pasting text from one location to the other is easier because you don't have to worry about copying the formatting like you do in WYSIWYG applications.
- The document layouts are more robust; they don't start screwing up for no reason like sometimes happens in WYSIWYG applications.
- You have precision control over every aspect of your output.
- Vast quantity of add-ins that provide you with ready-made solutions to document challenges.
- Very high quality output, due to the TeX engine, a brainchild of Donald Knuth.
Draw backs:
- Very forbidding to those who have only been exposed to WYSIWYG applications and windowing environments.
- Poor documentation.
- Can't exchange source documents with other people like you can with Word.
- Poor font control.