Within your landing page, the 'Genius Blocks' feature presents you with the opportunity to further personalise the content of your pages. 'Genius Blocks' allow you to include snippets specific to contacts of different segments, all within the same landing page.
Firstly, select the landing page you wish to add 'Genius Blocks' to.
Hover over the snippet you wish to make a 'Genius Block' and the edit options below will appear: