You go to your Google Analytics stats and discover that your time on site has dropped dramatically and your bounce rate has skyrocketed. What’s going on?!?

Your site has been hit by referral spam. If you look at your traffic sources in Google Analytics (Reporting – Acquisition – All Traffic – Source/Medium), you will see sites listed as referrers with a 95-100% bounce rate and almost zero time on site.

While this traffic doesn’t hurt you from an SEO standpoint, it certainly wreaks havoc on your Google Analytics stats — making marketing analysis extremely difficult.

Unfortunately, you can’t remove any past data from your reports. However, you can set up a filter to stop any known referral spam urls from showing up in future reports.

Here is what to do:

1. Go to Google Analytics. Click Admin at the top.

2. On the left side, click All Filters.

3. Click New Filter.

4. Enter Filter Name. (We usually use the name of the domain we’re filtering out.)

5. Click Custom. Under Filter Field, click Campaign Source.

6. Under Filter Pattern, enter the url you want filtered out.

7. Apply Filter to all Views so you don’t have to make one filter for each Google Analytics account. This is a great time saver if you are monitoring multiple domains. Click Save.