Hi all! I need some help.

I was going through SEMRush today and realized there's a huge discrepancy between two keywords - "Sell my stuff fast" and "Sell your stuff fast", with the prior having nearly all the traction and the latter having a measly 10. Does you/my seriously matter for keywords like this in metas, or is the difference negligible?

Please explain this like I'm 5. I'm new to all this and would love some info.