Ask What are the most effective ways to secure a membership site from hackers?

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I want to protect my membership site from hackers but I don't know how. I've heard about security breaches, and I don't want my members' data at risk. Can I use special software, stronger passwords, or something else? I also don't know if I need extra security for payments and user accounts. I want to make sure my site stays safe and trusted. What are the most effective ways to secure a membership site from hackers?