Can someone fill me in on the American Express Delta gold card?

I was offered it for the first year free and was able to check my bags for free because of it which was great. However I don’t know if it’s worth keeping after the first year and I’m a little ignorant when it comes to credit cards. Can someone fill me in on the pros and cons of this card, and whether you think it’s worth it?

If you have any tips on how to best use it, I’d appreciate it!