Delegation means that you are essentially 'lending' your voting power to the bot, allowing it to vote more powerfully. The steem power is always in your ownership and you can cancel the delegation at any time if you are unhappy, think of it like a loan that you are in full control of in terms of how long it lasts etc.
Try sending me a direct message on discord and I can walk you through it. or put your discord name here and I will get ahold of you.