Sprout Studio helps you understand your business at a whole new level by using tracking technology to see whether or not your client has viewed certain items, such as their booking proposal.
Go to the Lead > Booking Proposal page and you'll notice in the top-right corner there is a tracking badge. It will either say:
Unviewed, which means the booking proposal has not been viewed yet.
Viewed X Times, which means your client has viewed it X times.
If your client has viewed the booking proposal, you can click on the "Viewed X Times" badge and see the following details for each of the views.
Date it was viewed at.
Device it was viewed on.
Browser it was viewed from.
IP Address it was viewed on.