Deluge

Share Ratio Limit: This one is straightforward for most people, but is basically states if the ratio of seeding/downloaded in size reaches this then place torrent into queued status

Seed Time Ratio: This one was not originally very clear to me, but I found out from another forum it basically means, if time seeding/time downloaded >= this amount, then set torrent to queued status Example, if it takes 10 minutes to download a torrent, and you have this set at 7.00, then the torrent will seed for roughly 70 minutes (70/10 = 7) before going to queued status.

Seed Time (m): This is also pretty straight forward, and means if a torrent has seeded for x minutes, then place to queued status.

Setting any of these of course to -1 bypasses that test on the torrent.

Stop seeding when share ratio reaches: Means the torrent will stop altogether after it has reached this limit.