Bookings
A client who has to ring during business hours often does not. Every treatment page on your site ends in your own booking link, sized for a thumb, next to the information people need before they commit: what the treatment is, how long it takes, and what it costs where you are allowed to say.
Booking apps list you beside every competitor in the suburb. Your own site does not. IBISWorld counts 38,066↗ hairdressing and beauty businesses in Australia, so being the page a client lands on matters.