Create a zone and install the tag

A zone is one placement on one site. It has one format, one tag, its own net floor and its own passback. You can create up to 10 zones per site and 50 per account once the publisher terms are accepted. A zone only serves once its site is live.

• Popunder: the advertiser's page opens in a new tab at the visitor's tap. No image.
• Banners: 300x250, 320x50, 300x100, 300x500 and 320x100, shown where you paste the tag.
• Corner slider (300x250): a fixed, closable box in the bottom right corner.
• Interstitial (300x500): a full-screen layer at the visitor's first tap, never on page load and never right after a popunder. At most once per visitor per 24 hours.
• In-page card (320x100): a fixed card at the bottom of the screen, after 3 seconds or the first scroll. At most once per visitor per 6 hours.

The Formats page shows each one and its public minimum price.

1. 1Open Sites & zones and pick the site.
2. 2Choose a format.
3. 3Give the zone a name you will recognise in reports (optional, 60 characters at most).
4. 4Set your net floor: the lowest amount you accept per 1,000 valid impressions, net, as you receive it. It is required, between 0.01 and 50 USD, and prefilled with a suggested net floor for the format.
5. 5Paste your passback (optional, see below). Interstitial and in-page zones have no passback.
6. 6Create the zone and copy its tag.

One net floor applies to every country. You can change it later in the zone settings, but a zone always keeps one.

Each zone has its own tag, one line:

<script src="https://fieldwren.com/t.js" data-z="z1a2b3c4d" async></script>

Paste it in your page HTML where the zone should show. Slider, interstitial and in-page zones need no placement: the tag builds its own box, so anywhere in the page works. Use the exact tag of the zone: the data-z value is the zone key.

After the first visit, the zone shows Tag detected, usually within 5 minutes. Every night we also look for the tag on your home page and record whether it was found.

If you put the same zone in several places (header, footer, a landing page, a partner), add up to three labels to the tag and the Reports page will split your numbers by them:

<script src="https://fieldwren.com/t.js" data-z="z1a2b3c4d" data-s1="header" data-s2="landing-a" async></script>

• data-s1, data-s2 and data-s3 are optional and free: you choose the words.
• Each label is 64 characters at most, using letters, digits, _, . and -. Anything else is removed.
• Do not put personal data in them (no emails, no user ids). They are only used to group your own numbers.
• In Reports, break down by Sub ID 1, 2 or 3. The 200 labels with the most impressions are listed, the rest is added up as (other), and views without a label show as (none).

A label shows up in Reports from the next page view after you change the tag. Past views keep the label they had.

When we do not buy a visitor, the tag puts your passback in place of our ad, so the spot is never empty and your usual network keeps earning. The passback is plain HTML, up to 10,000 characters: use the tag of ONE spot of your usual network, with the size of the zone. The Developers page has examples.