Welcome to Steemit numanbutt. Let me know if you got any questions about Steem or anything related to it! The official FAQ can be found here and has A LOT of information https://steemit.com/faq.html - Also remember, Steemit is just ONE of the sites built that uses Steem the blockchain. We also have DTube - our very own Youtube, DSound for Soundcloud and Steepshot if you prefer Instagram like experience. I'd also like to mention ChainBB - forums, Busy - Steemit with more modern look basically, DMania for memes and Dlive for streaming just like in Twitch! You can also earn Steem by gaming now! Search for Steemgar if that's more your thing. Welcome to the blockchain! :)
Thank you very much for your time and for this detailed reply.
I wanted to know something about "bot"
What are they and for what purpose they are used?
Bots just do automated tasks, you could script one yourself which for example votes on certain group of people always, not missing even one post. Everything you can do yourself here on Steemit, you can make your bot do as well.