Why sgtools?

Filtering entries

easier to ignore rule breakers than dealing with them.

Basically what Mully said.
Additional option can be that you can really fine-tune who you want to allow to enter. Low level but generous people, people with less than a set amount of CV / games won, only wishlist, or you can even make a giveaway where only people with 0 wins can enter.
But generally used to close out people who broke rules previously / are below a set ratio.

Just like lovol said, to filter entries..
Let's just say that you only want people with X rules to enter your giveaway, and prevent other people who can't pass your rule to enter the giveaway.

You can check sgtools thread here

Alight thanks guys for explaining >:

Bump

I use it to have a custom group of people enter a giveaway without spamming the group recruitment. I can also alter it to suit the giveaway I am creating. Non-bundles will go to people with a positive ratio because I personally think if someone has won more than they've given they don't need more. Heck, I think I've won way too much!

It also is a nice way to filter out rule breakers such as people who have vac bans, multiple or non-activated wins. Although, I highly recommend checking your winners using the script on the SGTools website. Since this is a self policing website, I tend to make my Bundle games level 0 and "fish" for rule breakers.

Because SGTools has a lot of functionality\reqs to filter entries so you don't have very wonderful giveaway winners and a truckload of re-rolls.

Some people use them to avoid having to deal with rule breakers.

I prefer not to use them in my GA and have the trouble in dealing with rule breakers in hope to clear up SG a tiny bit.