Seven plays, in the order to run them: rewrite the headline as an outcome, move proof next to the buy button, answer the top three objections on the page, kill the discount dependency with better price framing, cut the page down to one decision, fix the mobile buy path, and give buyers a reason to come back.
None of these require a redesign, a new theme, or a bigger ad budget. They are copy and layout changes that ship in a day and read within a few weeks of traffic.
If your Shopify conversion rate is low, the cause is usually one of four failures: the offer is unclear, it is not believed, the price feels like a risk, or there is no reason to care about the brand. Diagnose which one before changing anything.