Have you ever been creating a report for a client or colleague and notice that all kinds of strange traffic from semalt.com, buttons-for-website.com, and other weird places is showing up?
That's what is known as Referer Spam. One of the biggest culprits - Semalt -is examined in detail in this excellent post by Jan Kearney.
Unfortunately, referer-spam seems to be an increasingly common tactic and may be showing up in more and more of your reports.
To remove referer-spam from your Megalytic reports, you can use filters. Here's a support document that shows how: Removing Semalt and other Referer-Spam from Reports.