Hello @hazellrogato
Google-Friendly webpages are those that are indexed with robots.txt. ... The tool framework allows for the addition of URL to the iFrames on a page so that the index of the content is not the parent HTML document. When crawling, Google will not rank the iFrame content and its keywords have high on a search engine result.
in SEO do on-page and off-page activities
hope this points helps you to understand