Select and refine a profitable, focused niche for a solopreneur business. Use when deciding which market segment to serve, narrowing a broad idea into a defensible position, or evaluating whether a niche is worth committing to. Covers niche generation, multi-criteria scoring, validation checks, and the Who+What+Why positioning formula. Trigger on "pick a niche", "what niche should I target", "narrow my market", "find my niche", "choose a niche", "is this niche viable", "niche down".

为个体创业者选择并优化一个盈利且专注的细分市场。用于决定服务哪个市场细分、将宽泛的想法聚焦为可立足的定位，或评估某个细分市场是否值得投入。涵盖细分市场生成、多标准评分、验证检查以及Who+What+Why定位公式。触发关键词包括：选一个细分市场、我该瞄准哪个细分市场、缩小我的市场范围、找到我的细分市场、选择一个细分市场、这个细分市场可行吗、聚焦细分市场