Hallo , In the excel table I have, there are street name, house number and post code information. Can I create point data of type Shapefile from this information. Or should it have a value of X and Y? Thanks...

You could use the Geocoder to do that, it supports various different geocoding services (some of which require an account and/or are paid). I've used the OpenCage one myself and if I recall correctly it has a pretty generous free usage tier, I don't have any experience with the others.

thanks