eCommerce conversion starts long before checkout
Categories, filtering, product-page quality and trust signals influence sales before a shopper even adds a product to the cart.

A strong online store reduces the number of decisions a user needs to make. Categories should be clear, filters useful and product pages should explain value quickly.
Mobile experience is critical because it is often the main sales channel. CTA sizing, sticky controls, speed and checkout forms directly influence conversion.
Trust is built through details: clear delivery information, returns, secure payment, strong imagery and a consistent visual system.
Only after the core buying journey is clean does it make sense to optimize remarketing, automations and retention flows.