[Which are necessary platforms to build an e-commerce website ?]

Choosing the right eCommerce platform is really a daunting decision. So, I'm going to share with you multiple effective platforms on the basis of popularity, overall reputation, features, customer service, pricing, and ease of use.
Here are the necessary eCommerce platforms are Shopify, Wix, Bigcommerce, Squarespace, Weebly, Volusion, and GoDaddy.
Shopify (Best All-around e-Commerce platform)
Overall rating (4.7/5), Ease of use (⅘), Multi-channel integration, payment options available for all except Square
Wix (Great value for money)
Overall rating (4.3/5), Ease of use (3.6/5), No multi-channel integration, Payment option only for Paypal, Stripe and Square
BigCommerce (Best Inbuilt features)
Overall rating (4.2/5), Ease of use (3.3/5), Multi-channel integration, payment option available for all
Squarespace (Best design templates)
Overall rating (4.2/5), Ease of use (3.4/5), Multi-channel integration, Square and Amazon payment options not available
Weebly (The one to watch)
Overall rating (4.1/5), Ease of use (4/5), No multi-channel integration, Apple pay and Amazon payment options not available