Ask What is the difference between a sales funnel and a membership site?

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I keep hearing about sales funnels and membership sites, but I don't really understand the difference. Are they the same thing, or do they serve different purposes? I know both involve selling something online, yet I'm not sure how they work. Do they use the same tools and strategies? I don't want to set up one when I actually need the other. I need a simple explanation so I can figure out which one is right for me.

What is the difference between a sales funnel and a membership site?