
This article is a WTF explainer, in which we break down media and marketing’s most confusing terms. More from the series →
Of all the advertising functions that the third-party has been co-opted to perform, keeping track of the content — including the ads — that someone is exposed to online is among the most basic uses. This fundamental use case is the focus of a proposal in Google’s Privacy Sandbox called Shared Storage.
Shared Storage basically serves as a storage locker within people’s browsers that advertisers, publishers and ad tech firms can use to stash information across sites and to act on that information. For example, an advertiser can use Shared Storage to tally the number of times someone was served a specific ad and cycle in a new ad to serve next, as covered in the video below.
More in Marketing

More brands are blending deterministic and probabilistic data for hybrid targeting approaches
Advertisers are exploring AI-assisted lookalike modeling for new audience targeting approaches — brought on by the fading third-party cookie.

The Home Depot adds another acronym — ‘ROMO’ — in next phase of negotiating retail media network measurement
The Home Depot is pitching a new acronym: ROMO, or return on marketing objectives, in addition to return on ad spend (ROAS) to help marketers paint a more holistic picture of their campaign efficacy.

‘It’s become a personality brand now’: Why Tesla’s brand perception is in a tricky spot as sales slump
Elon Musk has become a polarizing figure given his role in President Donald Trump’s administration and it looks like the ripple effects of that polarization are affecting the Tesla brand.