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Hi. Basically, when you log in and enable auto liking a bot starts using your account to upvote other user's posts. For every upvote done with your account, you get "credits", which you can later use to get upvotes from other people using steemvotes.
So it's really just exchanging upvotes with other people.
If you got more questions you can sure write me on steem chat. Username is same as here on steemit.

"enable auto liking a bot starts using your account to upvote other user's posts" who chooses posts to upvote , and what %s use for each upvote, and how many upvotes made daily… ???

you are not registered yet on SteemChat ;)

Each upvote uses 100% weight, you earn credits based on your current voting power and your total steem power, to make it fair.
Only posts submitted from other steemvotes members are upvoted. Upvotes are made as long as auto liking is enabled, or as long as there are posts from other users to upvote, or until you run out of voting power (in that case your account is set to sleep for 3 days to recover).

I hope I could answer your questions.
I just registered on steemchat a few minutes ago. Maybe it takes some time :)

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