Influencers are individuals who have a sizable following on social media or other platforms. Brands use these individuals to promote their goods and services. Because of their fame, knowledge, or rivals in the niche market, these influencers and their followers affect consumers' decisions to purchase brand goods or services. Experts in marketing post it in real time on their social media profiles. Social media marketing, also known as SMM, is used by influencers to help brands sell their goods and services. Since most consumers under 25 will typically pay more attention to appeals made by people their own age than by those made by older people, influencers are very effective. Micro or nano influencers, who have smaller, more invested audiences, are a group of well-known and lesser-known social media personalities who collaborate as part of an influencer marketing campaign. It is simpler to establish a budget, target market, and campaign objectives when these tactics are customized for particular brands.