Does anyone use a “recent sales popup window” that tells current site visitors that Bob C. from Alberta bought product XYZ 3 minutes ago?

I want to run some tests to see what, if any, modifications can improve my on-site conversions, and I was wondering if anyone has/had first hand knowledge of using "Sales Pop-ups", "Recent Sales notification windows" etc .. (Supposedly builds customer trust, social proof, fomo, etc)

Curious to hear your experiences