Most stores do not audit performance until something feels obviously wrong, by which point they have usually been leaking revenue for months. The symptoms are recognizable if you know what to look for. Here are the signs it is time for a performance and conversion audit.
Pages feel slow
If your store feels sluggish to you, it is worse for customers on slower devices and connections. Slow pages fail Core Web Vitals, hurt SEO, and cost conversions before any UX improvement can help. A subjective sense of slowness is reason enough to measure it properly.
Mobile converts far below desktop
Some gap is normal, but a large one signals fixable mobile friction, poor performance, awkward layouts, a painful checkout. Since mobile is likely most of your traffic, that gap is probably your single biggest revenue leak.
Bounce and exit rates are high
Visitors leaving quickly, or dropping out at a consistent point in the funnel, indicate friction: unclear value, confusing navigation, or a specific broken step. High exit on a particular page is a signpost to exactly where an audit should look.
You've accumulated a lot of apps
Apps solve problems and add weight. Stores that have installed a dozen or more over the years often carry scripts loading on every page, dragging down performance and INP. If you cannot remember what every app does, an audit will usually find redundant ones costing you speed.
Traffic is up but sales are flat
The clearest signal of all: you are spending more on acquisition and not seeing proportional revenue. That almost always means the conversion problem is on-site, not in the ads. A UX audit finds where ready-to-buy visitors are being lost.
What an audit gives you
A proper audit covers speed and Core Web Vitals, funnel drop-off, app and script load, and mobile and UX friction, then delivers a prioritized list of fixes ranked by impact and effort, not an undifferentiated wishlist. That is the starting point of a structured CRO and performance program.
If several of these signs sound familiar, the leaks are already costing you. An audit turns a vague sense that "the site could be better" into a concrete, prioritized plan.