I need some help understanding frame data

Classic Fighting Games Ultra Street Fighter IV
1

I’ve been playing SF for a long time now, and I still dont understand frame data.

For example: xxxxx move is -3 on block so you have the advantage and can punish.

What does all that mean.
If someone can try to explain frame data, maybe I can take my game to the next level.

I don’t understand +3, -3, on block, on hit… blah blah

2

Did you read

This

3

How is this Balrog specific.

4

Cause I main Balrog and needed the help, but…
Thank you very much, I big light bulb just went off above my head.

Thanks
That link is a big big help.

5

Not a problem