Bots

Discord Bots are programs coded into Discord Accounts that can have their own commands, features, and more. Discord Bots can be made for Moderation, Fun, Gaming, NSFW, and other purposes. Well known examples of Discord Bots are MEE6 and Dank Memer.

Are Bots Safe?
That depends, Discord Spam Bots are not safe, Moderation and Fun bots are perfectly okay. However some bots can be used for malicious purposes. Such as Tupperbox, (A Multiple Account Emulator/Roleplay bot) Tupperbox allows for the creation of Webhooks that act like different accounts. Some people use these webhooks by Tupperbox to discretely spread hate, use slurs, etc. But that's not all Tupperbox is used for, thats only done by hateful losers on the Service.

Where do I get Discord Bots?
There are websites such as top.gg and discordbotlist.com that act as Discord bot hosting services. There are many other sites as well, but these ones seem to be the most relevent.