Implementing schema markup is often overlooked, but it can significantly impact a search engine marketing campaign's success. By adding schema markup to website pages, businesses can provide search engines like Google with a clear understanding of the content and context of their website. This enables users to make informed decisions when searching for products or services, resulting in improved click-through rates and conversion rates. However, schema markup is not just limited to website optimization, it also plays a crucial role in enhancing search engine knowledge graph and visibility. By including relevant schema types, such as 'Reviews', 'Events', or 'Business', businesses can provide users with more information about their products or services, making them more discoverable in search engine results pages (SERPs). Furthermore, schema markup can help to improve local SEO by providing search engines with location-specific data, making it easier for users to find businesses near them. In essence, implementing schema markup is a key consideration when optimizing a search engine marketing campaign, as it can enhance visibility, drive more traffic, and increase conversion rates.