There are several metrics to determine the success or failure of your pop-up messages, and to find out whether you achieved the goal that you set from the pop-up. Furthermore, using these metrics you can look for pleasant surprises, or certain things which didn’t work out as anticipated, and also figure out if one element was more successful than another. Below are few key metrics that can be used to analyze and make informed decisions for your online business: 

• Drop-off rate
  Analyzing the drop off rate in pop-up helps to identify which specific field in the form the majority of your visitors are exiting from, and discover what led them to leave a particular field most often. This data can be used to develop better pop-up content, design, and CTA color that attracts your visitors to immediately fill in the input fields to unlock the benefits on your site.
  
  

• Time or duration of pop-up
  Timing is another crucial factor in your pop-ups success. There may be times when you're getting a large number of visitors and impressions on your report, but your customers may not be taking a desired action, and instead are closing the the pop-up window immediately. Een with the right message and attractive discount offered, it can be hard to grab visitors' attention if your pop-ups are not delivered at the appropriate time. For instance, imagine a flash sale where items are heavily discounted, but only for an hour or two. This method of timed pop-ups is a great method to build enough hype around a flash offer, while also improving sales within a short span of time.
  
  

• Sales and revenue
  The measure of the average sales and profit made on your website by month, week, or time of day is a direct indicator that the new offers and promotional banners have worked well for customers. For instance, imagine people walking into your store and searching for culinary products. You're already offering them a 50% discount on kitchen items, so they end up buying items from your store. On the other hand, for people who simply walked out of your store without making a purchase, the pop-ups can be tailored to show more relevant offers the next time to drive sales.
  
  

• Response by visitors
  Website pop-up surveys are the easiest way to collect valuable feedback from visitors, and track their mood on your website. Showing the same survey to all visitors on your website means you can expect hundreds of results, which can help you fully understand the needs of each visitor. Carefully analyzing the response from individual visitors by asking relevant questions like why they are leaving, what stops them from buying, and how do they feel about the design can help tailor your webpages better, and obtain higher satisfaction of users.