Why need html

Answer 1

If you are a programmer, chances are you will have to write HTML at some point, because HTML is essential for formating content that must be displayed on the web.

HTML is used to write web pages and good-looking e-mails (usefull if you need to send newsletters).

If you ever need to format content on the web and you don't know HTML basics, you will be stuck.

Besides, HTML is really easy to learn, it literraly only takes a few hours. What can take a little more time is to learn how to make it look the way you want it to look (with CSS). CSS is a bit more complex (but still pretty easy actually).

Learning HTML and then, CSS, is like learning to read and speak web.