Sentence:  Businesses hit a <WSD>sweet spot</WSD>—"a place, time, or experience in which a company's brands, products and services, finances, leaders, and employees are in tune and in time with consumer neds, aspirations, and budgets"—"only" when (no matter how global, or gigantic, the company) everything and everyone is aligned. <WSD>Sweet spot</WSD> companies practice full-circle marketing, which means that "everyone" must become part of the marketing team. 
Meaning of the word marked with <WSD> tags:  Any set of conditions that is optimal for obtaining a certain desirable effect or result.