Add to, Don't Interrupt an Experience

Whilst interrupting an experience can still land you results, you need to consider the wider impact on your website visitors. Whenever you're testing any new method of capturing email data, make sure that you're keeping a close eye on the impact it's having on bounce rate, pages per session and time on site.

I've run tests with popups in the past that seemed to work well for capturing more email address but my bounce rate has significantly risen in the process. This is often the case when you display popups as soon as someone visits your site. One major consideration here, outside of the fact that more people are leaving your website prematurely, is that if they're coming from the search engines, so increasing your bounce rate could have a negative impact on your keyword rankings.

Whilst you may be increasing your conversion rate, you could be decreasing your traffic at the same time. Just bear this in mind before you try anything new out, and test, test, test.