What does mega stand for?

Excuse me, could you please clarify what "mega" stands for in the context you're referring to? Is it being used in a technical sense, such as in computer storage or network bandwidth, where it typically denotes one million units? Or is it perhaps being used in a colloquial or slang way, where its meaning could vary depending on the context? Understanding the precise context in which "mega" is being used would greatly help in providing an accurate explanation of its meaning.