Can someone please explain this paragraph to me?

It’s actually two paragraphs and they are after this one. These two paragraphs are about Vuze, a downloading program; just explaining the best way to get faster downloads. the main Part I don’t understand is when it says choose a “high seed to peer ratio”, to help you help me, with each download there is a certain amount of “seeds” and a certain amount of “peers”, and I just automatically thought the ones with the most seeds and peers would be faster but I guess not! So the two paragraphs are these two———->

The general rule here is to choose torrents that have a high seed to peer ratio. Seeds have 100% of the content associated with the torrent and are only uploading to peers. Peers also upload to other peers, but are also looking for other peers to upload to themselves and their download capacity is almost always higher than their upload capacity.

This applies even though one swarm has significantly more active users than another. For example, a torrent with 30 seeders and 70 peers (30% seeders) will generally be faster than one with 500 seeders and 2500 peers (20% seeders) as the average upload capacity available to the peers will be higher