Session replay is an add-on feature for paying customers only. You may try the feature for free for 14 days or 10,000 sessions (whichever comes first), after which you must contact Sales to continue use.
Many of our customers run Heap on public-facing, content-rich sites, and robots can generate unwanted sessions.
Heap blocks a list of 100+ common bot User-Agents by default. A list of these bots is available to customers by request.
If you suspect bot sessions have been captured by Heap, do the following Group by the suspicious sessions using User-Agent and check if the User-Agent string contains anything that looks like a bot.
If there seems to be a large amount of bot traffic, reach out to Heap support for assistance.