What retailers accept PayPal?

Could you please elaborate on which retailers currently accept PayPal as a payment option? I'm particularly interested in knowing if any major clothing brands, online electronics stores, or grocery delivery services integrate PayPal into their checkout process. Additionally, I'm wondering if there are any specific requirements or conditions that retailers need to meet in order to start accepting PayPal payments. Finally, I'd like to know if PayPal offers any incentives or benefits to retailers who choose to accept their services. Your insights would be greatly appreciated.