Open rate shows a percentage of total recipients that viewed your email. You can track it in HTML emails that include a transparent image (a tracking pixel). When it’s loaded, an email is tracked as open. This metric isn’t 100% accurate. As mentioned earlier, some email providers block images, and a user needs to enable them to see the visual elements.
Before you can send AWesome emails with AWeber, you'll need someone to send it to. The easiest way to begin building your list is to import contacts that have opted-in to your email list, or gave you permission to send them emails. These could be subscribers you've emailed from another provider, or a list of contacts that you've built through your business.