“Siloing a website means grouping related pages together, either structurally or through linking, to establish the site’s keyword-based themes”
Silos are content taxonomies and linking structures that help to index your content, distribute link juice, add additional relevancy signals and push up rankings.

The infographic below demonstrates exactly how to set up both organizational silos andinternal linking silos for search engine optimization.

Silo’ in terms of SEO is referring to the internal linking structure of your website.

Original Link: https://www.quora.com/What-Is-SILO-In-SE