In Flagship, traffic allocation depends on a combination of a Murmurhash algorithm and a variationGroupId. Each visitorId sent to the API (through POST request or thanks to the SDK) will be processed by this algorithm and, depending on the results, the visitor will be assigned to a specific variation.
The API uses the same bucket-style as the bucketing feature.
Depending on the percentage of traffic you configured in the platform, visitors will be assigned to a specific bucket.
It is the same principle for dynamic allocation. The only difference is that the allocation changes depending on report results. However, a user who has already been assigned to a variation will still see the same variation. Dynamic allocation redirects only new visitors to the best performing variation.
Learn more about dynamic allocation.
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