Username: the account's address, and the one profile field that breaks links

The username is the handle: the identifier nobody else on the platform can duplicate. It appears at the top of the profile, in every mention, in every tag, and forms the account's public URL.

Do not confuse it with the display name, the bold text just below. The display name can repeat, accepts spaces and accents, and can be changed with no technical consequence. The username has none of those freedoms.

Practical rules: up to 30 characters, only letters, numbers, periods and underscores. No spaces, no accents, no hyphens, no emoji.

The priority order that saves headaches:

• The brand name, clean. If it is free, the discussion is over.
• Brand plus category. When the clean one is taken, appending the field usually beats stuffing in numbers or underscores.
• Easy to say out loud. This matters more than it seems: if you have to spell it on a podcast or a live, it is wrong.
• Consistent with your other channels. The same handle everywhere reduces friction and typos.

What to avoid: strings of underscores, numbers standing in for letters, and anything that depends on punctuation to make sense. All of that becomes someone else's typo, and a typo sends your audience to a different profile.

This is the strategy point most people miss. The username and the display name feed Instagram's internal search. The body of the bio, in general, does not in the same way.

In practice: if there is a word you want to be found by inside the platform, its place is the name field, not the bio. Plenty of accounts do the opposite, stuffing the bio with terms and leaving the name field as a personal name.

Worth testing in the platform's own search, because behaviour changes over time and varies by region.

Changing the handle takes a few taps and has long consequences:

• The old URL stops working, and every link pointing at it breaks.
• Old mentions stop linking to you.
• The old handle becomes free for someone else to claim, including someone who wants to impersonate you.
• Printed assets and published video start pointing at nothing.

If the change is genuinely necessary, announce it beforehand, keep the old name mentioned in the bio for a while, and update the links you control first.

• I can say my handle out loud without spelling it.
• It does not depend on underscores or numbers to make sense.
• It is the same on my other platforms.
• The word I want to be found by is in the name field.
• If I change it, I already know which links I will need to update.