How do businesses track online activties? Purposes, methods, different entities are explained well in this FTC article . What are Flash cookies? What is device fingerprinting? How does tracking in mobile apps work? Who places cookies on the web? along with first-party, third party cookies are detailed in the article. While third party cookies are going away, but here's an excellent article on third paty cookies , past, present, and future. Speaking of first party and third party data, here is a good example provided on Stirista blog . In their mini-case study, here's how they used Twitter users' data to enhance reach and conversions for L'Oreal: L’Oreal is a well-known global brand that, through its namesake brand, as well as its subsidiaries (which include LancĂ´me, Maybelline and Garnier among others), manufactures and distributes skin care, fragrances, hair care and cosmetic products.Targeting your competitors’ followers, a.k.a. Competitive conquesting, simply makes ...