urgency

The first two options not working correctly. See Screenshot, only the line with "have bought this item" worked correctly. I'm using the popular Flatsome Theme from Themeforest. 38064738242 people have viewed this item 18669905585 people have added this item to cart 4 people have bought this...

After watching youtube channel, There are people recommend for installing a sales countdown plugin to create urgency in the store and create higher conversion rate. Any recommendation?