What Is an Affinity Audience?
An affinity audience is a targeting category used primarily in Google Ads and YouTube campaigns that groups users according to their established interests and passions. Unlike in-market audiences, which capture short-term purchase intent based on recent searches, affinity audiences reflect who someone is over time, based on months of sustained content consumption, searches, and online behaviour patterns.
Google classifies users into hundreds of predefined affinity categories. Examples include "Sports Fans", "Travel Buffs", "Cooking Enthusiasts", "Small Business Owners", "Health & Fitness Buffs", and "Avid Investors".
These classifications are built from signals like what websites a user regularly visits, what YouTube content they watch most often, and what search topics they return to repeatedly.
A user who consistently reads automotive content, watches car reviews on YouTube, and searches for car-related topics will likely be placed in the "Auto Enthusiasts" affinity category.
Affinity audiences are best suited for the top of the marketing funnel.
When a brand wants to introduce itself to a large, broadly relevant audience without requiring that the person be actively shopping right now, affinity segments offer the reach and relevance needed for effective awareness campaigns.
A new South African craft beer brand launching nationally might target the "Foodies & Dining Out Enthusiasts" and "Nightlife Enthusiasts" affinity segments across Google Display and YouTube to build recognition before potential customers start actively seeking out new beers.
Google Ads also allows advertisers to create custom affinity segments by providing URLs of competitor websites, apps, specific interests as keywords, and even physical locations relevant to the audience. This is valuable for South African businesses in niche categories.
A Cape Town surf school could build a custom affinity segment around surf-related websites, travel content, and outdoor lifestyle publications, creating a far more targeted awareness audience than any predefined category would offer.
Affinity Audience In Practice
The scenario below is an illustrative example, not a Juicy Designs client result. The outcomes described indicate the kind of effect that affinity audience targeting typically produces, so treat them as indicative rather than measured.
Picture a Johannesburg-based premium pet food brand that wants to grow awareness ahead of a product launch.
It might set up a YouTube bumper ad campaign targeting the "Pet Lovers" affinity audience across South Africa, combined with a location refinement to focus on the major metros: Johannesburg, Pretoria, Cape Town, and Durban.
Its 6-second non-skippable ads would introduce the brand and its positioning, reaching pet owners at scale for a fraction of what equivalent TV advertising would typically cost.
Alongside the awareness campaign, the brand could run a separate Google Display campaign targeting the in-market audience for "Pet Food & Supplies" to capture users who are actively looking to switch brands or try something new. The affinity campaign would fill the awareness top of funnel.
The in-market campaign would then convert those who are ready to buy. Together they form a complete upper-to-mid funnel strategy within a Google Ads account, complemented by retargeting campaigns to close the loop on website visitors who show purchase intent.
How affinity audiences work
An affinity audience is a group of people defined by their longer-term interests, passions, habits and lifestyle, used in advertising to reach people with a broad, established affinity for a topic or category. Advertising platforms build affinity audiences by analysing sustained patterns of behaviour, the content people consume, the sites they visit, the topics they engage with, over time, grouping those with a consistent interest, such as sports enthusiasts, frequent travellers or home-and-garden hobbyists. Because affinity is about who someone is and what they are consistently interested in, rather than what they are shopping for right now, affinity audiences suit broad awareness and reaching people whose general interests align with a brand, putting a message in front of a relevant, receptive audience earlier in the journey. They contrast with in-market audiences, which capture active, recent purchase intent. Affinity audiences answer the question of whose interests fit your brand, useful for building awareness among the right kind of people.
Using affinity audiences effectively
Affinity audiences are most useful for awareness and upper-funnel goals, reaching a broad audience whose interests and lifestyle align with your brand, so your message meets receptive people even before they are actively shopping. This makes them well suited to building brand awareness and consideration among relevant audiences, and to campaigns aiming for reach rather than immediate conversion. Because affinity reflects general interest rather than active intent, affinity audiences typically convert less directly than in-market audiences, so they are often chosen deliberately for awareness objectives rather than direct response, or layered with other targeting to focus. A common approach uses affinity audiences to introduce a brand to the right kind of people, and in-market audiences or remarketing to capture those closer to buying, matching audience type to funnel stage. Testing which affinity audiences perform for your goal matters, since the platform's interest categories are inferences and fit varies. Used for what they do best, reaching interest-aligned people at scale for awareness, affinity audiences put a brand in front of the right audience early in the journey.
FAQ
When should you use affinity audiences versus in-market audiences?
Use affinity audiences when your goal is brand awareness, reaching a broad group of people who share relevant interests over time. Use in-market audiences when your goal is lead generation or sales, as these users are actively researching a specific purchase. Many South African advertisers use both together, affinity for reach and in-market for conversion, across different campaign types.
Can you create custom affinity audiences in Google Ads?
Yes. Google Ads allows you to build custom affinity segments by entering interests, URLs, places, and apps that define your target audience. This is useful for South African businesses with niche customer profiles that do not fit neatly into Google's predefined affinity categories, allowing you to create a more tailored awareness audience based on competitor sites or industry-specific interests.
Can you create custom affinity audiences?
Advertising platforms offer both predefined affinity audiences and options to build more tailored, custom affinity-style audiences based on interests, sites and behaviours you specify, letting you define a group aligned with your brand more precisely than the standard categories. The exact capabilities and names vary by platform and change over time.