Affinity: With affinity audiences, you can reach people based on a holistic picture of their lifestyles, passions, and habits. It can be broad and match to some random targets.
For example, a company selling golf clubs will naturally want to target ‘golf enthusiasts’, but this could apply to both golf players and golf watchers.
Custom Affinity: With custom affinity audiences, advertisers can create audiences that are more tailored to their brands.Here marketers have better control in their targeting with smaller and more refined audiences. By factoring in consumers’ most recent passions and ongoing interests, your message always reaches the right users.
For example: Adding interests such as “improve golf swing”, “golf practice” and “golf putting” gives you a better chance to hit your desired market.
In Marketing: Select from audiences to find customers who are in the market, which means that they're researching products and are actively considering buying a service or product like yours.
For example: Some body is looking for particular brand for Golf Clubs.