How trait time-to-live (TTL) interval affects segment membership.
Time to Live
TTL defines how long a site visitor remains in a segment after the last trait qualification event. TTL is set on traits and not on segments. Visitors fall out of a segment if they do not see a qualifying trait before the end of the TTL interval. The default TTL for new traits is 120-days. When set to 0-days, the trait never expires. Set the TTL value when you create or edit a trait in the Advanced Options section of the trait creation interface.
TTL and Dropping Out of a Segment
A user falls out of a segment if they do not see any of its traits within the TTL interval. For example, if you have a 1-trait segment with a 30-day TTL, the user will drop out of that segment if they do not see the trait again within the 30 days.
TTL and Segment Renewal
The TTL resets, and the user remains in a segment, if they see that segment’s trait within the TTL period. Also, because most segments contain multiple traits with their own TTL periods, a user can remain in a segment (and reset the TTL interval) as long as they keep seeing any traits associated with a segment. For example, say you have Segment 1 composed of Trait A (30-day TTL) and Trait B (15-day TTL). Assuming the user sees each trait only once, the illustration below outlines the TTL renewal process and total in-segment duration.
Audience Manager TTLs are Independent of Third-Party TTL Settings
Remember, the TTL set on your Audience Manager pixel operates independently from the TTL set on other pixels used by third parties (DSPs, ad networks, etc.).