"Share via barcode" can be useful. Say you want to tell someone some contact info for you, but neither of you currently have any contact info on the other. If

"Share via barcode" can be useful. Say you want to tell someone some contact info for you, but neither of you currently have any contact info on the other. If your phones have screens and can read barcodes, which I presume they can, no need for one of you to say some number or email address while the other types it in. One person just shares via barcode, and then the person that just got that contact info shares theirs back using that contact info. Also, emailing or texting links to someone right there at the table with you contributes to needless inbox clutter.