India, ChatGPT's second-largest market, reveals distinct user behaviors like prioritizing WhatsApp over email and spoken over typed commands. This highlights the need for AI products to adapt to local communication norms in the Global South, rather than assuming Western-style usage patterns.

Consumers in markets like Kazakhstan adopt new technologies more rapidly than in the US or Europe. With fewer legacy systems and entrenched habits to change, the adoption curve for new digital services is significantly steeper and faster.

Intentionally create open-ended, flexible products. Observe how power users "abuse" them for unintended purposes. This "latent demand" reveals valuable, pre-validated opportunities for new features or products, as seen with Facebook's Marketplace and Dating features.

Personal biases and preferences should not dictate marketing strategy. A marketer might dislike pop-ups or emojis, but that doesn't mean their target audience feels the same. The most valuable tests often involve tactics that challenge a marketer's own assumptions about what works.

Don't assume selling in Europe is the same as North America; it constitutes a new market entry. Companies often make a 'ton of assumptions' about marketing data, buying cycles, language, and regulations, underestimating the difficulty and risk of the move.

To prevent over-indexing on internal user needs, Anthropic tests new products internally while concurrently offering them to external customers in early access. This dual-feedback approach ensures the platform remains broadly applicable and avoids becoming a niche internal tool.

When enabling Microsoft's international sales teams, ISVs must use localized use cases. A success story from the US market is less relatable and therefore less effective in regions like Denmark, where reps need examples that mirror their own customers' context and scale.

Mobile user behavior towards ads differs significantly by region. European users are more willing to pay a small fee (e.g., $0.99) for a premium, ad-free experience once hooked. In contrast, North American users convert better on free trials, and APAC users tolerate high ad frequency.

Instagram's test allowing users to control their algorithm by selecting topics might harm discovery. Market research consistently shows a gap between what people claim they want and their actual engagement habits, creating unpredictable outcomes for content creators.