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This has come up recently internally as we are an agency that traditionally only focuses on SEO. However, when asked to articulate the benefits of how they can work together I normally see rather vague and non-actionable answers that don't really translate to real life always. I can understand how you can use SEO techniques to improve the ROAS of a PPC campaign by improving the quality of a landing page. I am also aware of a number of ways you can use Adwords data from your campaign to improve your SEO campaign but I am curious to know. How else can the two channels work together to help each other out?