In detail
E-E-A-T is not a single ranking factor. It describes what Google's systems try to reward: content written from real experience by people who know the subject, published by a business that is clearly identified and trusted.
Real author names, real client testimonials, clear contact details and accurate facts all support it.
How this relates to our work
E-E-A-T comes up most often in our SEO / SEM work. Technical SEO, content and paid search that put your business in front of people already looking for it.