Repository 18 Install - Cloudstream

Why is there so much confusion around "Repository 18"? Is it a version of the app? Is it an extension pack? And most importantly, how do you install it safely without downloading malware?

: A massive aggregate that includes various content types, including NSFW providers. Important Considerations 18+ - CloudStream Wiki - Miraheze cloudstream repository 18 install

: Because these extensions are community-driven, some may become unmaintained over time. If an extension stops working, it may be necessary to look for an alternative provider or a more current repository. Why is there so much confusion around "Repository 18"