Once you have setup Pipedrive integration within your Enudge account, whenever any of your contacts whom you imported from Pipedrive interact with your messages, that interaction will appear in your Activity Feed.  

For an email campaign named "Promote Enudge to long term clients" here's how those updates will look in your contact's activity feed:

Email Open:
(Nigel received the email from Heather Maloney.  The feed will be updated every time that Nigel returns and opens the email again.)

Click Through on a URL:
(in this case a holiday destination website was linked to from the email)

Shared the Email in Twitter:
(A similar update would appear for sharing in Facebook or LinkedIn, naming the appropriate social media platform).

Forwarded the Email:
(Nigel forwarded the email from Heather Maloney to 1 other person)