Google Keyword Planner, Majestic, and Screaming Frog SEO Spider are three key SEO tools that help content marketers publish quality content that stays at the top of search results. Google Keyword Planner provides data-driven insights into search habits, allowing users to identify keywords to target and create relevant content. Majestic helps discover online relationships by analyzing websites linking to a given site, enabling users to nurture and grow these connections. Screaming Frog SEO Spider identifies broken pages on a website, such as 404 errors, and suggests fixing them with custom titles and redirects. By leveraging these tools, content marketers can improve their search engine optimization strategies and stay ahead in the digital marketing landscape.