For most of the bloggers and publishers, the number one call-to-action on content pages is to get visitors to optin with their email IDs. Without building an audience, you cannot grow as a blogger, and one of the best ways to build an audience is to build an email list!
There are many ways get your visitors to optin. One of the most common methods is a lightbox modal that appears on the screen, either on page exit or after a few seconds of the website visit. But they are still forms and it can be a boring task to fill forms. Other methods include a top bar that collects email ID, modals that appear on link-clicks and optin forms below blog posts.