Mechanics in this trade know each other. A tech thinking about leaving a shop may already have heard something about yours, and your careers page is where he checks it. He's not browsing. He's looking for specifics: how the shop pays, what's in the bays, and who runs the floor.
That page is doing the same job as the rest of your marketing: your careers page is a marketing page.
Pay structure is the first question
A technician wants to know what a shop pays, and just as much, how it pays. Flat rate or hourly? If flat rate, is there a guarantee under it? Is diagnostic time billed and paid? How is the labor guide applied, and who decides when a job runs long? Are comebacks paid? What happens to his week when the shop is slow?
Those aren't awkward questions for a shop with good answers. They're a large part of the decision. Explain how the pay works, even without a number, and your page already reads differently from the ones offering a career opportunity with a growing team. Being straight about it reads as competence. A shop that can explain how it pays is a shop that knows its own numbers. When the page says nothing, he guesses.
The bays tell a mechanic the truth about the shop
Next he looks at the shop itself. The equipment decides what his day feels like and what his ticket looks like at the end of it. What shape are the lifts in? Is there an alignment rack? Which scan tools does the shop own, and are the subscriptions current? Can the shop handle the vehicles that actually roll in, including hybrid and electric work? Who buys a specialty tool when a job demands one? Where do the boxes sit, and how secure is the building? Is the shop heated and cooled? That sounds minor until August.
This is where photographs do the work. He can read a shop from a picture faster than from any paragraph you write, and real photos of your building tell him you're not hiding anything. A stock photo of a smiling mechanic under a hood does the opposite. He's seen it on plenty of other shop sites, and he knows what it means.