Which of the following methods is specifically associated with SEO?

Blog content is specifically associated with SEO because it plays a crucial role in improving organic search visibility and driving traffic to a website. Search Engine Optimization (SEO) focuses on enhancing a website's ranking in search engine results pages, and high-quality blog posts contribute significantly to this objective. By using strategic keywords, optimizing headlines, and providing valuable, informative content, blog articles can attract both search engines and users.

Regularly updated blog content can help a website appear more relevant and credible in the eyes of search engines, which is vital for achieving higher rankings. Additionally, blogs can generate backlinks, social shares, and increase user engagement, all of which further enhance SEO efforts. Other methods listed, like email marketing and PPC advertising, serve different purposes within digital marketing and do not directly contribute to organic search ranking in the same way as blog content does.