Question about description on Nirvana

Ok, since I'm very new to Nirvana's website and to growing as well. I have a question about the description on their website...
Flowering weeks
Yield
Harvest Month

Any and all help would be greatly appreciated.

Flowering weeks - approx. time it takes for plant to flower fully (throw its buds) i.e 8-10 weeks on 12/12 lighting.

Yield - Basically how many grams u can expect from a meter squared with sea of green (as many plants as u can fit in that meter squared, about 6 inches a part or so, I believe).

Harvest Month - the month that you would harvest if you planted them outdoors.

Hope this helps.

Thanx man..it does help.