If you are referring to a specific item or site, could you clarify what it is? For example:

Did you perhaps mean a different name, such as a specific tech service like MEGA.io (cloud storage) or a different brand?

Is it a specific magazine, video series, or website?

slang. extremely good, great, or successful. Word origin. C20: probably independent use of mega- Collins Dictionary MEGA definition and meaning | Collins English Dictionary

Could you provide or a category for what you're looking for so I can find the right information for you? MEGA: Protect your Online Privacy

Is it a specific supplement or lifestyle product?