Search engine marketing, or SEM. The promotion of a website or web pages through paid advertising on search engine results pages (SERPs) is a digital marketing tactic. The main objectives of SEM include increasing a website’s exposure in search engine results and bringing in targeted visitors.Pay-per-click (PPC) advertising, in which advertisers place bids on specific keywords or phrases related to their goods, services, or target market, is the main activity that SEM comprises. The adverts, which are often labelled as “sponsored” or “ad,” show up alongside the organic search results when consumers search for such keywords.