<b>The wrapper: the referee of your auction</b>

<b>The wrapper: the referee of your auction</b>

A "wrapper" is a small piece of code that runs the header bidding auction. It's the referee — it invites the bidders, starts the clock, and collects the bids.

Why it matters: without a wrapper, each ad partner would load their own script in its own way, slowing your page and creating chaos. The wrapper makes them all play by one set of rules.

Tiny example: the wrapper says "Everyone, bids in within 1 second — go." Partners reply, the wrapper picks the highest, and sends it to your ad server.

One thing to try: ask whose wrapper you run. Most independent sites use Prebid, a free open-source one.

<b>In plain English:</b> the wrapper is the referee that runs the auction fairly and on time.