LTS is an analytics feature that adds support for detailed Traffic API requests for periods longer than 31 days.
The extended period can be selected according to the customer needs and can span from several months to years. Within this period, the Traffic APIs will normally support the same combination of groups, fields (except the urls field) and filters as normal. However, the explodeUsers filter and uniqueUsers fields can be used only for a single site, i.e., when the number of sites is 1. See the API documentation (e.g., /traffic or /traffic/event) for more details.
If you are interested in this upgrade, please contact your account manager for pricing information.