Brand advocacy refers to the positive word-of-mouth that satisfied customers share about a brand, product, or service. It involves customers, employees, partners, or any stakeholders who enthusiastically promote and support a company without being paid. 

Related diversification is a strategic approach in which a business expands its operations into areas similar to its existing operations. Unrelated diversification is a corporate strategy in which a company expands its operations into areas that are not linked to its current businesses or industries.

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