Steam has a feature called Steam Trading Cards.
These are virtual cards that players can earn by playing certain games.
Completing a set of cards allows users to craft a badge, and these badges can unlock various features like profile backgrounds, emoticons, profile levels, and more.
Steam Card Bots are bots or automated scripts that users may deploy to automatically trade, buy, or sell these cards.
These trading bots can help users complete sets more efficiently and cheaper.

Once you get all the case keys needed for leveling up, open up a chat with the bot you’ll be trading with. Type the command !buy (number of keys you have, Ex: !buy 20) in chat with the bot and the bot should send you a trade offer corresponding to the amount of keys you offered. Accepting the trade might take some time if you traded a lot of keys. Once the trade has been completed, click here to start crafting badges. Keep crafting until there are no more cards or until you feel like stopping. These same rules applys to TF2 and Gem Bots.

Didn’t get the trade offer?

• Make sure your keys are tradeable, buying off the market makes them untradeable fora 7 days.
• You might have the wrong key or not enough, double check that you are using the right command.
• The bot could be offline.
• It’s broken, notify the bot or bot owner about this.

Note:
Bots check your badge page NOT your inventory.
After finishing a trade always craft all the badges you got before buying again.
Never accept a trade request with your keys with promises that the cards will be sent to you later
Always validate the trade has the correct number of sets, you can verify the set amount with our extension

Bots will automatically be placed there if

• They are offline. Or recently been.
• They do not have enough sets to complete there highest rate command
• They are missing ANY data. Remove any commands on Bot Edit page you do not use