When I think of unique relevant quality content I also look at unique personal human identifiers which set each person apart from another.
Yes most people think in terms of fingerprints, DNA, hair fragments, fingernails, toenails, and so on... Or at least that has been my experience.
Profilers spend countless hours examining people and how similar and yet different each person is or isn't. This is a emotional to rational to other stages in - of - and about the mind which motivates us to do or act in a certain way a.k.a. Behavioral Psychology and Modification. We generally associate this with those having emotional or mental issues BUT what about marketing... Absolutely! a.k.a. Behavioral Psychology and Marketing
From the time we were born to the end we are directed as to how to observe, create emotions both internally and externally, and how to act and react. Rather we see it, smell it, taste it, feel it, or hear it we respond as such.
Marketing Psychology is not a new concept... And we as digital marketers just like the advertising agencies of yester-year utilize a variety of strategies to get your services and or products found, found and more significant in a target market, and create conversionary selling ie call to action points. This is done both of course on your websites and off through a variety of channels. We in the days of old didn't just set behinde a desk in an office, and neither does your professional marketers behinde your websites.
Thanks for reading - more on consumer psychology
From Hubspot here is another article on this topic: Consumer Psychology: Marketers revealing principles of human behavior