Solved
Is s.channel automatically set
We are also storing channel value in an evar, but I do see lot of garbage data in the evar while the data in site section report looks clean.
Hi , No it is not set automatically by the solution.
More information on how it can be set is found here:https://marketing.adobe.com/resources/help/en_US/sc/implement/channel.html.
If the value is polluted in your reports it might be useful to run a report to identify examples of the pages which are passing the "dirty values" so that you can get your developers to address them.