Although, in general, you cannot know the sampling distribution of the sample mean exactly, by what distribution

Question:

Although, in general, you cannot know the sampling of the sample mean exactly, by what can you often approximate it?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...