GWI (GlobalWebIndex)

gwi.com

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GWI runs its own large-scale surveys across dozens of countries, so its numbers on how people use apps, video, and devices come from primary polling rather than aggregated secondhand stats. That makes it a solid grounding source for a notebook on shifting social media or device habits by region or age group. Most of the underlying data sits behind a paid subscription, so what you can pull for free tends to be summary charts and blog posts rather than full datasets.