Search engine marketing (SEM) is a digital marketing method that businesses use to enhance online visibility and increase website traffic. There are several synonyms for SEM, including pay-per-click (PPC) advertising, search advertising, online advertising, and search engine advertising. PPC advertising is a popular form of SEM where businesses pay for clicks on their ads, appearing at the top of search engine result pages (SERPs). Search advertising involves optimizing website content and using targeted keywords to improve organic search rankings. Online advertising is a broad umbrella term that includes all forms of digital advertising, including SEM. Lastly, search engine advertising is specifically focused on paid ads on search engines. All these synonyms refer to the same marketing technique, but with varying nuances depending on the approach and goals.