Five things that decide whether an online store sells
Before you spend on ads, make sure the store itself is not the reason people leave.
Traffic is expensive. Losing it inside your own store is worse.
Product photography carries the sale. One clear, well-lit image of the actual product does more than a page of marketing copy.
Search and filters are navigation. If a customer cannot narrow sixty products to five, they will leave rather than browse.
The checkout should feel short. One page, visible total, guest option, and no field you do not actually use.
Shipping and returns must be stated early. Prices that appear at checkout erode trust faster than a slightly higher price shown up front.
Mobile is the store. Check every step on a real phone, on a real connection, before launch.
Fix these and paid traffic starts compounding instead of leaking.