The conversion funnel is the path someone follows from arriving on your website to becoming a customer. Looking only at the final result (how many sales there were) hides exactly where along that path most people are being lost.
The typical stages of a funnel
Visiting the site, viewing a product or service page, adding something to the cart or filling in a form, and finally completing the purchase or submission. At each step, some percentage of people drop off; the goal isn't to eliminate that loss entirely (it's normal and unavoidable) but to identify at which step more people are dropping off than is reasonable.
How to spot the real weak point
By comparing the percentage of people who move from one stage to the next. If 80% of people who view a product page leave without adding anything to the cart, the problem probably lies with that page (price, photos, information) not with the traffic arriving at it.
Why this is more profitable than chasing more traffic
Fixing the step where most people drop off often multiplies sales without spending an extra euro attracting new visits. It's common for businesses to invest in advertising to send more people into a funnel that already has a clear leak, instead of fixing that leak first.
Frequently asked questions
What tool do I need to see my conversion funnel?
Google Analytics lets you set up funnels using your website's key pages or events at no extra cost. For a more visual analysis, heatmaps and session recordings complement that data well.
Is it normal to lose people at every stage of the funnel?
Yes, losing some people at each step is unavoidable and expected. What's worth watching is that the loss at each step is reasonable compared to your industry's average, not that it disappears entirely.
How often should the conversion funnel be reviewed?
A monthly review is usually enough, except after major changes to the site or a campaign, when it's worth checking as soon as possible whether the funnel has been affected.