A sponsor is just someone who's worked the 12 steps who is ready to help someone else work the 12 steps and live life sober. For me, it was part of asking for help. I asked a woman at a meeting to be my sponsor and she worked the steps with me. She's since moved away and I've been with my current sponsor for 2 years. Sometimes the relationship doesn't work out for whatever reason, so we can always move on to another. Women usually sponsor women and men usually sponsor men.
My sponsor is a trusted friend who I take the majority of my problems to. Even the smallest little thing can lead me to drink if I'm not careful. Since she knows me so well, she nearly always knows how to get me out of my head. She has 17 years of sobriety, and I'm so grateful to her.
Sponsors just make suggestions. They don't tell us what to do. They tell us what they did to get what they have. If we want what they have, we do what they do.
It works because I can see that she's made it through anything and everything without taking a drink. Without someone who's walked the road before me, I wouldn't know how to do it. She's my guide.
I hope that helps.....

Rayna