Explain the 1 bb per 100 hands

Can someone explain the win rate formula in ring games of 1bigbet per 100 hands to me?

I think it's pretty much self-explanatory: for every 100 hands they play, a player with this aim is looking to make one big bet in profit. So if you're playing $10-$20 limit hold 'em, and you sit down with $800, you're looking to have $820 in front of you after 100 hands

The version I hear more often is one big bet per hour. Rather than taking big gambles and experience wild swings, the aim is to just grind things out and aim for a small but consistent profit - it's looking at poker more as a way to earn an hourly wage than it is gambling.

1 BB / 100 or 1 BB / Hour is a pretty conservative estimate for a decent player... in some of the poker pros books 2-3 BB / hour is listed as standard, which is a lot more than 1 BB / 100 hands. It depends on the table and your level of ability, though, naturally.
It's not about whether you're taking gambles or not - it's about average results. Some periods you'll have a run of good cards/luck, some periods you'll have bad cards and bad beats - in a short period you can easily get lucky and make 20 BB / hour, but you have to balance that against the bad sessions to see where you end up. Poker Tracker and other stats programs help with this as they allow you to automatically calculate your BB/hour stats - the most important thing obviously being to make sure it's positive.

Thanks for the feedback. It was helped me to understand the concept better.