AWS Certification - Knowledge levels and study recommendations required to pass

As I've recently taken a couple of AWS certification exams I thought it might be useful to share my experiences.

I've been working with AWS in production for 4+ years so decided it was time to firm things up and took the ACSA back in August. I did about a months worth of supplemental prep for it, 2-3 hours a day, predominantly using the Linux Academy online syllabus.