What is HTML5?

Question

I'm learning HTML, and I don't understand when it says "[...] not supported in HTML5"
help me please :(

Answer 1

https://www.sololearn.com/learn/HTML/2211/?ref=app

Answer 2

Just another modified version of HTML...

Answer 3

thank you so much :D
I can understand now

Answer 4

HTML5 is just a better version of HTML4.01 they added more tags and removed others tags which are redundant .so if it it's not supported by HTML5 chances are it has been removed .but everything you can do in HTML 4.01 you can do in 5. even better