Which of the following best describes ‘SEO’ in digital marketing?

Search Engine Optimization (SEO) is a critical aspect of digital marketing aimed at enhancing a website's visibility in search engine results. The correct description emphasizes the strategic practices involved in optimizing websites so they can be indexed and ranked higher by search engines like Google, Bing, or Yahoo. This optimization includes various techniques such as keyword research, content creation, link building, and technical SEO, all designed to improve the quality and quantity of web traffic to a site.

SEO focuses on increasing organic traffic through unpaid search listings rather than relying on paid advertisements. By improving the site's relevance and authority, businesses can achieve better rankings, leading to more visibility among potential customers searching for specific terms online. This approach is fundamentally about understanding how search engines work and applying that knowledge to create content that meets both user intent and search engine algorithms.

The other options do not accurately describe SEO. For instance, the references to "Search Engaging Optimization," "Social Engagement Optimization," and "Selective Element Optimization" do not align with established terminology in digital marketing practices and fail to address the role of search engines in the context of increasing visibility and traffic through optimization.