We use ‘HAVE BEEN’ when referring to a completed visit to a place = the person has returned or is no longer there.

EXAMPLE:
Have you ever been to the Slovak Republic? ✓     Have you ever gone to the Slovak Republic? x
He has been to India four times. ✓     He has gone to India four times. x
I’ve been to the pharmacy today. ✓     I’ve gone to the pharmacy today. x

MORE EXAMPLES:
I’ve been to my grandma today. = I returned from my grandma.
Message Laura for the course book. She has been to school to pick it up. = She returned from school.
Emily is back home now. She has been to Germany. = She has now come back.
I’ve just been to the supermarket. I’ve bought a lot of fruit. = I have now come back.
Are you going to the butcher? No, I’ve already been to the butcher. = I have now come back.

NOTE:
BEEN TO or BEEN IN ?
We use BEEN TO when we’re talking about places that we have visited in our lives.
I live in Slovakia. I have never been to Japan.

We use BEEN IN when talking about living or staying somewhere from the past up to the present moment. 
Elena loves Sweden. She has been in Stockholm for three years.