What is the primary focus of Search Engine Optimization (SEO)?

The primary focus of Search Engine Optimization (SEO) is indeed increasing a website's visibility and ranking on search engine results pages (SERPs). SEO encompasses a variety of strategies and techniques aimed at optimizing a website's content, structure, and overall performance to ensure that it can be easily indexed and understood by search engines like Google. By improving elements such as keyword relevance, site speed, mobile-friendliness, and backlink quality, a website can rise in search rankings, making it more likely for users to discover it through organic search results. This process is crucial because higher visibility often leads to more traffic, greater brand awareness, and potential conversions, all of which are vital for online success.

The other options, while relevant to different aspects of digital marketing, do not specifically encapsulate the essence of SEO. Creating digital advertisements focuses more on paid marketing strategies, improving customer service protocols relates to user experience rather than technical optimization, and designing website layouts involves aesthetic and functional elements rather than search optimization techniques.