Why am I getting duplicate Activities Logged in Marketo?

Overview

Usually seen in test environments, duplicate activities happen in Marketo when multiple browser cookies associated with the same person are detected by the player.

Symptom

Vidyard analytics shows only one view for the video player, but the activity log in Marketo logs the webpage video view multiple times.

Cause

The player will detect Marketo cookies installed on the browser when it's loaded. If there is more than one cookie, the player will push the video view information for all of them to Marketo.

Solution

You can do two things to resolve this problem:

1. Go the Settings area of your browser and clear your browser cookies. 
2. If you are testing a new form or video with Marketo, consider testing in incognito mode so your known browser data is not associated with the view.