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Nguyễn Tú2,333 Points
Why we should use this tag? is that used when categorizing h1, h2, and h3... I need some definition and the way to use tag. Please help!
Div tags are used to strukture your code and group elements together, so you can format them in css together.
You can make two div elements, put content in them and now you can float the div to get two collumns. or give the div a background color, so all the elements inside have one - if you would give every element themself a background color you would have problems with the margin between.
I hope that helps.