Credit score?

This is a random question is it normal or realistic for a credit score to raise 50 points after getting a credit card?

Credit karma emailed me saying my score raised and I thought maybe a point or two but I just about killed over when I saw it jumped up as much as it did.

I made a lot of dumb mistakes young with my credit and shot it to hell and spent many years trying to get it great to buy a house with my husband. I finally felt it was good enough to apply for a credit card to get it even better especially since I’m older and wiser and know how to use it properly.

So is this real life?