I think the hardest part in presenting a product is remembering the word that you’ve prepared before to describe that product when you got nervous because it will make you blank and can’t remember everything.
I have recorded my product presentation and I got some difficulties such as I have to repeat some records because I am very nervous and I didn’t know what I should say.
In my opinion, what makes a product easily marketable is depend on the quality of the product, how the seller sells the product, and how the seller promotes or persuades the purchaser to buy it.