Which of the following best defines SEO?

Search Engine Optimization (SEO) is best defined as the practice of optimizing website content to enhance its visibility in search engine results pages. This involves various techniques and strategies implemented to increase organic traffic to a website. By improving elements such as keywords, metadata, site structure, and content quality, businesses can rank higher in search engines like Google. This increased visibility is essential for attracting potential customers actively searching for relevant products or services.

Other options do not align with the definition of SEO. Promoting products through social media relates more to social media marketing rather than search engine optimization. Creating content for print advertising focuses on traditional marketing mediums and does not involve online search visibility. Measuring marketing ROI pertains to the analysis of investment returns in marketing efforts, which is a separate area of study within marketing that does not directly involve the optimization of search engine results. Thus, the correct definition of SEO is clearly aligned with the goal of enhancing website content for better search visibility.