There are two dimensions you can use to look at hourly traffic:
- Hourly traffic (server)
- Hourly traffic (user)
Let's assume one user visits your site at 8am in France, and another at 8am in Japan. Your server is in France.
The Hourly traffic (server) dimension will show the time that the hit was received on the server, which is in France; an analysis would reflect one visit at 8am and one at 1am (the visit from Japan).
The Hourly traffic (user) dimension will instead show the local time of the hit that was sent. In your analysis, you would get two results at 8am.