As you mine, you will find shares that will increase you payout when the network finds a block. Find your address, and look at the "Avg. Time to Find Share" column. On average, it will take this long for you to find a share on this network.
What is this Share Difficulty?
Payouts are weighted based on the amount of work each share took to solve, which is proportional to the minimum share difficulty
at that time ((loading) in this case). Your hashrate will determine how long it will take, on
average, to generate a paying share on this network.
The Avg. Time to Share column is an average estimation of how long it will take to generate one of
these shares. As there is a factor of luck involved, your actual time to generate a paying share could be much shorter, or much longer.
