When it comes to sharing your research with other genealogists, the GEDCOM file is king. This is the closest thing we have to a universal format, and any program or web service worth its salt will allow you to both import and export all or part of your tree as a GEDCOM file to share with others.
That said, GEDCOM isn’t a perfect format - not even GEDCOM 7.0, released in June 2021. - at least not directly.
