Step 1: To Add Product Inside left Side Bar Click on Products -> Add New Product

Step 2: Once Clicked Add Product Form will Appear, you need to Provide and Select following information

Product Name [Required], Main Category [Required], Sub-Category [Required], Child Category [Required], Product Description [Required], Current & Previous Price [Required], Product Tag [Required, Used for Search Function].

Once you Provide Above information you can upload the product image, if you have multiple images you can upload them using product gallery option.

Step 3: Click Submit to Save your Product.