I'm trying to understand my cohort data and something there doesn't make sense:
On day/week 0 I have sometimes less than 100% - how can that be logic ? If I choose "all sessions" shouldn't it be 100% always in day/week 0 ?
Why isn't it 100% when I choose a segment ? What does it mean if I have 50% on week 0 for a specific segment - that the start group is 50% of what ?
Also, where can I find benchmarks for this data in order to understand where I'm at in the industry (Mobile app, Transportation or service)