Someone fills out a form on your site wanting a quote. What happens next matters more than almost anything else in your entire marketing setup, and most businesses get it wrong without realising.
The person who just enquired is, at that exact moment, comparing you against whoever else they've also messaged. If you call them back within five minutes, you're still front of mind and they're still in "deciding" mode. Call them back three hours later, and there's a good chance they've already booked in with someone who got back to them first, even if your price and quality were better.
This is why we build instant notifications into every lead system we set up. The moment someone submits a form, the enquiry is sent straight to your phone and inbox, by WhatsApp or email, so you're never finding out about a hot lead by accident hours later.
It sounds like a small operational detail, but in practice it's one of the highest-leverage things you can fix. You could double your ad spend and get the same number of extra bookings as just calling leads back faster.
Every AdSimpler client gets this set up by default: every enquiry sent straight to your phone or inbox the moment it comes in, so speed is never the reason a job slips away.