The short definition
A conversion is a completed action you defined as valuable.
The definition is yours to set, which is both the flexibility and the danger.
What should count for a service business
In descending order of usefulness:
A booked job. The real outcome. Rarely tracked automatically, because it happens in a diary rather than on a website.
A phone call over a meaningful length. A call lasting long enough to be a real conversation, not a wrong number.
A form submission. Easy to track, and the most commonly used.
A click on a phone number. Important on mobile, frequently untracked, and for many local businesses it represents most of the enquiries.
What should not count
Page views, time on site, scroll depth, newsletter signups treated as equivalent to enquiries.
These are sometimes called micro-conversions and they have a legitimate diagnostic use. The problem starts when they are counted alongside real enquiries in the same total, which inflates the number and makes the report meaningless.
If a "conversion" cannot become revenue, keep it in a different column.
The two failures that ruin the number
Firing on the wrong event. Tracking that triggers on page load rather than on submission counts every visitor as a conversion. The rate looks superb and means nothing. This is common and easy to check.
Missing phone calls entirely. For a service business where most people phone, tracking only forms understates results dramatically and makes every call-producing channel look weak.
Conversion rate
Conversion rate = conversions ÷ visitors.
Useful for comparing pages against each other and for tracking a page over time. Not useful as a benchmark against other businesses, because it depends entirely on what you counted and what traffic arrived.
A page with a 2% rate on highly relevant traffic can produce more work than one with 8% on traffic that was never going to buy.
Testing yours
Submit a real enquiry through your own website. Within a day, check it appears as a conversion where it should.
If it does not, every downstream number — reports, ad optimisation, budget decisions — is built on fiction. It is a five-minute test and a surprising number of sites fail it.
Getting it right
Decide what counts, track only that, verify it fires, and keep the diagnostic metrics somewhere separate.
Frequently asked questions
What should count as a conversion for a service business?
A booked job first, then a phone call of meaningful length, then a form submission, then a phone number click on mobile. Anything that cannot become revenue belongs in a separate column.
What is the most common tracking mistake?
Firing the conversion on page load rather than on submission, so every visitor counts. The rate looks excellent and the number is meaningless.
Is my conversion rate good?
There is no useful external benchmark, because the figure depends entirely on what you counted and what traffic arrived. A 2% rate on relevant traffic can beat 8% on traffic that was never going to buy.
How do I verify my tracking works?
Submit a real enquiry through your own site and check within a day that it appears as a conversion. Five minutes, and a surprising number of sites fail it.