How is KOL marketing effective in digital marketing in Vietnam

KOL marketing is called Key Opinion Leader marketing. It involves the brands that work with veteran people on a specific subject. Ensure that the experts are directly or indirectly connected with the brand or brands services and productsKOL marketing is called Key Opinion Leader marketing. It involves the brands that work with veteran people on a specific subject. Ensure that the experts are directly or indirectly connected with the brand or brands services and products