A membership plugin lets you set up a full-fledged membership program on your site. You can create members-only areas and you'll get control over what content and features you allow members to have access to. Added to that, you can create tiered pricing plans such as gold, silver, and platinum plans. You an also set up automated renewals, renewal reminders, and cancellations. The membership plugin will take care of the technical aspects for you while you can run your membership website with a user-friendly dashboard.