What is MLP distribution in my statments?

So I was looking at my account statements and I see this column:

INCOME AND EXPENSE SUMMARY:
MLP DISTRIBUTION (reported by partnership) : THIS PERIOD $134  YEAR TO DATE $134

MLP image

But I don’t even know what is MLP and I never do anything with it, so what is this mean ? Is it my income, or is it my expense.
I read about MLP in many websites but it is too hard to understand.
Thank you