I thought this may help everyone out. I'll give an example:
Comment from USA resident: "usb-3 charging cables sell non stop here"
Someone from Sweden sees it and look at their own marketplaces, noticing not many of these are sold. So they work on finding suppliers and start to sell. Boom! Profits!
Seems it could help people find ideas whilst not shooting yourself in the foot.
So, what do you see your marketplaces saturated with or growing rapidly?
I'm new here, sorry if this is dumb, just came to me when seeing someone ask for a product idea.