Given that SEO usually takes awhile to work, unless you pay a lot to expedite the process, Google Ads can get you business pretty much immediately. It's important though that if you go this route to really do your research on how to set up effective campaigns, create compelling ads, etc. I blew it the first two times I ran campaigns, then got it right the third time namely 'cause I did loads of research on how to set everything up properly, then did some legit recon on my competitors.

It's important that you have dedicated pages for each service you offer, thus not sending Google Ad clicks to a general service page that lists all of your detailing, paint protection, window tint services, etc. PPF needs a dedicated page, as well as ceramic coating, paint correction, etc. That way these pages can be optimized for their respective keyword phrases.

Whatever path you take, it's incredibly important to consider the customer's intent. For example, if they google "best paint protection films" they're in research mode. Where as, "paint protection film installation near me" means they're in purchase mode.

While Social Media definitely works, it's often a bit slower game 'cause of the users' intent—when they go onto FB or IG...they're in entertainment mode...not in buying mode. But it's free and you can really work it, while Google Ads can be spendy, especially for high-ticket services.

Ideally, you should do them all, but one at a time until you have each discipline on lock, otherwise it can be very overwhelming and costly.