go to the Products section Catalog → Products → Edit Product
The specially highlighted products will attract customer’s attention and more likely will be bought. If you want to emphasize the most important products on your Home Page, the Featured Products is exactly what you need.
To set a product to be a Featured one please go to product edit page in admin and trigger Featured setting. Once a product is set to be Featured it will be shown on the Home page in the featured block. In case block is disabled for some reason or you want to change it's position please visit Design → Layouts section. You can place the Featured Products block not only on the main page but also at other pages.
Featured products quanity
Set Number of Items In Featured Block in the System → Settings → General