- No, there’s no concrete way to know in advance. Look-alike segments should be made using groups of people linked in some way and similar in behavior.
- No, you can’t know this ahead of time. You can only experiment and track the impressions statistics for the Look-alike segment.
- Yes, you can. Segments should consist of users whose similarity is visibile in their statistics. The more similar they are, the better the segment will work as a Look-alike segment.