How to Add Adults-Only Age Verification to Your WordPress Site – WPMU DEV

Do you know who is visiting your website? And, more importantly, does the demographic of your visitors even matter? For some businesses and bloggers, that answer is a resounding: YES. If you’re reading this, you probably have (or need to implement) an age requirement restriction for visitors to your site. There are a variety of reasons for needing to restrict access to your content, but there are only a handful of ways you can go about enforcing this.

Source: How to Add Adults-Only Age Verification to Your WordPress Site