The string "2022-05-28_0h2o90f4o885o4ujxzq1t_source-bfAhAOL" is a unique identifier combining a timestamp, device ID, and campaign source used for tracking user activity and advertising attribution. It is characteristic of data exported from marketing analytics platforms to evaluate campaign performance and cross-device behavior, often found in systems such as SKAdNetwork. Learn more about source identifiers at Singular . What is a Source Identifier? - Singular