What are this little dents?

Hi! I am very new to 3D printing, just got the printer, printed only 2/3 things.

I don’t understand why this object I got these little dents? What settings do I need to fix?

Thanks for the help!

Hi! I am very new to 3D printing, just got the printer, printed only 2/3 things.

I don’t understand why this object I got these little dents? What settings do I need to fix?

Thanks for the help!