Hi Naman,
There are two types of Knowledge articles in salesforce:-
1.FAQs
2.Tutorials
Articles provides the structure and format to describe how an article displays for each audience,such as channel.In articles,you can create custom fields,customize the layout by adding and removing fields and sections,workflow rules and approval process.
New Article:-
Go to Setup, enter Knowledge Article Types in the Quick Find box, then select Knowledge Article Types.
Click New Article Type or edit an existing article type.