![]() Unlike the other storage APIs, you can only read the shared storage values in a secure environment, known as a shared storage worklet.Ī worklet allows you to run specific JavaScript functions and return information back to the requester. You can write to shared storage at any time, like other JavaScript storage APIs (like localStorage or indexedDB). Shared storage allows you to make informed decisions based on cross-site data, without sharing user information (such as browser history or other personal details) with an embedding site or exfiltrating data to your own servers. This allows for further experimentation and change, to grow alongside the web ecosystem. The proposal intends to create a general purpose API which supports many possible future use cases. You can use Shared Storage to build reports of unique users that have seen a piece of content at least K times. Sometimes described as “effective frequency”, there is often a minimum number of views before a user will recognize or recall certain content (often in the context of advertisement views). You can use shared storage to record user demographic data in a context where you have it, such as your 1P site, and use aggregated reporting to report on it across many other sites, such as embedded content. You can use shared storage to report on the first time a user saw your ad, embedded video, publication, and prevent duplicative counting of that same user on a different site, giving you an aggregated noisy report of your approximate unique reach.Ĭontent producers often want to understand the demographics of their audience. Many content producers and advertisers often want to know how many unique people saw their content. It’s possible to test many different strategies here, whether it’s using URL Selection output gate to encode a user trustworthiness rating or using the Private Aggregation output gate to build datasets for anomaly detection. You can store whether the user has registered on your site into shared storage, then render a different element based on that stored status.Īnti-abuse, anti-fraud, and web security organizations often use proprietary techniques to detect malicious users, whether automated bots or real humans trying to cause harm. ![]() You can store the creative rotation mode, and other metadata, to rotate the creatives across different sites. You can assign a user to an experiment group, then store that group in shared storage to be accessed cross-site. To balance and control for the number of views, organizations can record a user’s view counts in shared storage and display different content once the user has reached a predefined and customizable limit. The opposite side of the pendulum to effective frequency is oversaturation, showing users the same content too often leading to poor user experience. The Shared Storage API intends to support many use cases, replacing several existing uses for third-party cookies. Is your company looking for cross-site storage solutions that haven’t yet been addressed? Share your use case.
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