After spending much of last year building one side of its advertising marketplace, Zeus, the Washington Post is gearing up to open the other.

In the beginning of the second quarter, Zeus Prime, a self-service ad platform, will be opened up so ad buyers can reach users across all of the sites using Zeus Performance, the header bidding wrapper plus ad rendering engine that the Post announced in 2019 before opening up to all comers in January 2020; the Post has spent the past half year testing Zeus Performance on its own site inventory, running more than 100 campaigns for some 50 different brands.

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