Point Spread Explained Explain Point Spreads&over Under? (NFL Specifically) Please Help!?

Explain point spreads&over under? (NFL specifically) Please help!? - point spread explained

I play in a pool of survival to stand for the first time this year and I do not know what an idiot. I love watching football, and I am very good with the players, teams, coaches, etc., but even a winner so early in the season is beyond me. Who could help me, offer to read the statistics and the fighting would be a great help! I've never been a great player, I have no idea what the + and - 's points on average. And I could not many before the season and I'm not with all the teams. I like to learn, 2 or 3 weeks! :-)