The short answer
A website loses customers when it cannot do the one thing the visitor came for. For a restaurant that is taking an order, for a dentist or a barber it is booking an appointment, for any shop it is being open and readable on a phone. You can check all of that on your own site in five minutes, with no tools.
The five-minute check
- Can a stranger order or book without calling? Open your site as a customer would. For a business that takes orders or appointments, look for a button that starts one. A button that says “book an appointment” but only opens an email window is a booking button with no tool behind it. It counts as a gap because the visitor has to do extra work. A business that does not take orders or bookings, such as a dentist, is not penalised for having no online ordering.
- Is the site up? Open it on your phone using mobile data, then once on Wi-Fi. One failed load is not proof of a problem, so try twice. A site that does not answer both times is a problem the customer sees before anything else.
- Does it work on a phone? Look for a page that fits the screen without sideways scrolling. This is a look, not a score: a missing mobile setting is a hint, so take a screenshot and judge it yourself.
- How old does it look? Scroll to the footer. A copyright year from several years ago is a hint that nobody has touched the site. It proves nothing alone, so combine it with when you last updated your opening hours or prices.
- What is it built on? Many small sites run on a common site builder or a content system, and that tells you how easy changes will be, and who can make them.
Why each check matters
Each check is a separate observation, so you can apply your own rule. Take a restaurant with a clean, current site and no way to order: the gap is ordering. Take a barber with a booking tool that is down: the gap is the site being up. The fix for each is different and costs a different amount, so do not lump them together.
What this check does not tell you
It does not say your site is good or bad. It reads what is visible on the page, and a booking tool hidden behind a login or an unusual script can look missing when it is there. Treat each flag as a question to look at, not a finding to act on.
FAQ
Do I need a new website if one check fails?
Usually not. Most gaps are a single missing piece: a booking link, an expired certificate, an old footer. Fix that piece first.
How often should I run this?
Once a quarter, and any time you change your hours, prices or menu.
What if I do not know who built my site?
Look at the footer and the page source for a builder name. If neither says, ask whoever holds your domain account, because they can usually see where it is hosted.
If you would like a second pair of eyes on your own site, the booking page is /book.