What is the SILO structure on the website?

A silo structure is a type of website architecture where content is organized logically. It consists of hierarchical groupings including topics and subtopics. In other words, you can think about it as creating categories and sub-categories for your site and writing relevant content for them

Siloing a website serves to clarify its subject relevance and lays the groundwork for high keyword rankings. It is a core building block for SEO and is normally an advanced topic. The term siloing originated as a way to identify the concept of grouping related information into distinct sections within a website.