Relation marque/consommateur
(brand advocates = clients prescripteurs, clients ambassadeurs) :

"brand advocacy refers to the customer establishing a relationship (through joining a brand community and encouraging other customers to do so) with other customers who use the brand."
https://books.google.fr/books?id=h4cgi_Rcs0QC&pg=PA195&lpg=P...

"The bottom line for every company is to get more business and all efforts are geared towards activities that can fulfil this ultimate goal. The customer experience teams along with other departments within the organisations implement creative tactics and advocacy programs to increase customer satisfaction and loyalty to create stickiness towards the brand".
https://www.meltwater.com/in/blog/10-ways-increase-brand-adv...

Advocacy - activités de promotion
http://www.btb.termiumplus.gc.ca/tpv2guides/guides/lex/index...

"the concept of Brand Advocacy is not just a mere marketing strategy but has become a philosophy of the business to elevate the brand awareness, achieve sales closures, and attain the overall business objectives. It is one of the cheapest and effective marketing and promotional tool to build the confidence in the minds of the customers about the brand."
https://www.marketing91.com/who-are-brand-advocates-and-what...

"Brand advocacy takes loyalty to the next level by asking your customers to actively get involved with selling your brand. Essentially, it’s building on the affinity you already have with certain audience members and using that connection to convince them that they should be sharing your content with their friends and families".
http://fabrikbrands.com/how-to-create-a-brand-advocacy-progr...