You love the free shipping, but if you haven't gotten into Amazon Prime's biggest perk, Amazon Prime Video, then you're missing out. The streaming service's library of movies, TV shows ...

Learn more about an Amazon Prime membership. Get details on how much it costs, the benefits like Prime Video, free same-day grocery delivery and more.

Amazon Prime is regularly priced at $139 for the year or $14.99 per month, but there are many ways to get it free (including a 30-day free trial of Amazon Prime here) or at a deep discount.

With Amazon Prime Day returning July 8 to 11, it's a great time to consider how Prime compares to Walmart Plus and the stores' competing sales.