Quick take
Gemini is strongest when your work already sits inside Google. Gemini 3.7 Flash is Google's current stable general API model, while the Gemini app also connects research, writing, files, images, and Google apps. The weak point is focus: because it touches so many Google surfaces, you need to be clear about which source, file, or app it should use.
Best fit
Use Gemini when you want AI help next to Google Search, Google files, Workspace apps, and creative tools. It is a good fit for research reports, study material, content planning, lightweight data review, and daily productivity work.