There are three main feeds on Reddit.
Home: Your home feed is a feed of all the communities you’ve joined.
r/popular: This is a feed of the (you guessed it) most popular posts on Reddit.
r/all: This is a less filtered feed of the most popular posts on Reddit. When you’re on r/all, sexually explicit posts are filtered out but other popular Not Safe for Work (NSFW) posts are included. You can also filter communities you don’t wish to see from r/all.
If you have more questions that aren’t covered in these FAQs, check out r/help. Someone may have had the same question, or you can ask a new one and a Reddit administrator or one of your fellow redditors will help you out.