Two front doors
Plenty of your customers meet you on Google before they ever reach your website. They see your listing in the map, your reviews, your hours and a button to call. Some of them never click through at all.
So the listing and the site are two front doors to the same business, and when they disagree, your customer notices. A different number, hours that do not match, a suburb on one and not the other: each one is a small reason to ring somebody else.
The checklist
Business name: written exactly the same way in both places, without extra words stuffed in for search.
Phone number: the one you actually answer, in both places, and nowhere a second number your customer might ring and get nobody.
Hours: the hours you take calls, not the hours you are on site. If you answer from seven, say seven.
Service area: the suburbs you will actually drive to, the same on both. A listing that claims all of Adelaide and a site that says the western suburbs reads as one of them being wrong.
Services: the jobs you want more of, named the way your customer would type them rather than the way the trade says them.
What a listing will not do
Nobody can promise you a place at the top of the map, and anyone who does is selling something else. What a consistent listing does is stop you losing the people who already found you.
Every AllTradie build includes checking your listing against the site, so they say the same thing on the day the site goes live.