Ask What are the key design elements for a high-converting membership sales page?

[SuperAffiliateX]

I'm trying to create a sales page for my membership site. I want it to convert visitors into members. I know that the layout matters, but I'm unsure what else to include. Should I use testimonials or special offers? What about images or videos? I think clear calls to action are important too. I want to make sure the page grabs attention and keeps people interested. What are the key design elements for a high-converting membership sales page?