How do you share a social profile by tap?

The direct route and its cost

Writing the profile address straight to the tag works immediately and needs nothing else.

It also freezes you to that platform and that username. A rename, a platform change or an account you close leaves the tag pointing at nothing.

On a tag you keep, that is fixable by rewriting. On a tag you gave to somebody, it is not.

And you find out late, because nobody tells you their tap led nowhere.

Through your own address

A short address on a domain you own, redirecting to the profile. The tag never changes and the destination can.

You can also point it at a small page listing several profiles, which is more useful than one and costs the same.

The objection is that it requires having a domain, which is a small cost and the thing that makes everything else possible.

Without one, accept the direct route and know that the tag is disposable rather than durable.

Which profile

Ask what you want the person to do next, not which platform you use most.

One profile if the answer is obvious. A page listing several if it genuinely depends on who is asking.

A page also lets you explain, which a bare link cannot: which account is professional, which is personal, which one you actually read.

And a page is where you put the thing that is not a profile at all, such as a portfolio or a booking link.

Practical points

Test what happens on a phone that does not have the application installed, since the destination may open in a browser and look different from what you expect.

Test on both platforms, because the notification step on an iPhone changes the experience.

Keep the address short and readable, so it can be printed alongside and typed by anyone whose tap fails.

And check it occasionally. A redirect you set up two years ago pointing at a platform that has restructured is exactly the failure this design was meant to prevent.