https://www.logico.co/blog/why-your-business-must-have-a-website-and-how-you-are-losing-28-of-your-revenue/

https://enhencer.com/blog/google-ads-vs-facebook-ads-which-one-is-better-for-e-commerce

https://marketingguardians.com/businesses-without-mobile-supported-websites-are-losing-money/