The SEO silo concept is based on a website structuring approach that groups content according to its theme. This method, pioneered by SEO expert Bruce Clay, aims to create a compartmentalized organization to isolate each topic in dedicated silos. Links between the different silos are established only through the highest-level categories in the site’s hierarchy. Landing pages are prioritized to optimize the user experience. Each silo is semantically optimized to highlight its specific content. The category structure generally does not exceed four hierarchical levels. Long-tail keywords are often associated with the most specific categories at the bottom of the silo, while generic keywords are placed at the top.