Upload a custom audience

Upload a list of hashed emails, see how many households matched, and target that audience on a line item.

A custom audience is your own customer list, matched to households LtvAdx can reach. You upload hashed email addresses, never the addresses themselves.

Before you start

Your account must be approved. A sandbox account can open the page but cannot upload.
Only upload addresses you have the right to use for advertising. See Privacy and consent.
Prepare the file: lower-case each address, remove spaces, hash it with SHA-256 and write the 64-character result, one per line. A .csv or .txt file works.
An account can hold 50 audiences. Delete one you no longer use to make room.

Steps

Open Custom Audiences and select New Audience.
Name it, for example Car buyers Q4, and select Create.
On its row, select Upload.
Select Choose File, or paste the hashes into the box. The page counts the valid hashes it can see.
Select Match & Upload.

What happens next

LtvAdx matches the hashes to households it knows and builds the audience.

Each upload replaces the list. It does not add to it.
If at least 1,000 households matched, the audience is ready. The page shows the size rounded to the nearest 100, and an approximate match rate.
Below that minimum, the audience cannot be targeted and the exact number is not shown. This protects the people on your list.
You can change an audience, by uploading or removing, 10 times a day.
Lookalike audiences are not available.

To use it, open a line item, go to the Audience tab and tick it under Custom Audiences. See Line items and targeting. Only audiences that are ready and above the minimum appear there.

Delete an audience

On the audience's row, select Delete.
Select Delete again to confirm.

The audience and its matched households are removed and it no longer counts towards the limit. You cannot delete an audience that a live line item targets: pause that line item, or untick the audience on its Audience tab, first. A paused or draft line item that still lists a deleted audience reaches no one through it.

When it will not deliver

A custom audience shows only to households LtvAdx can identify on the ad request, and only on channels whose publisher allows audience data. A match rate far below 100% is normal: many people on a list are not on a connected TV that LtvAdx can see. The line item's delivery check warns you when a channel cannot match your audience.

If something goes wrong

Upload SHA-256 hashes only. This file has plain email addresses in it, and none of it was read. Hash the list and upload again. A file with any plain address is refused whole.
This is available once your account is approved. Wait for approval.
This audience has had its 10 changes for today. Try again tomorrow.
An advertiser can hold 50 audiences. Delete one you no longer use, then create the new one.
A live line item targets this audience. The message names the line item. Pause it, or remove the audience from it, then delete.
Fewer than the minimum matched. Add more addresses and upload the full list again.