> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.readable.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What is the SMOG index?

SMOG is a readability framework which can be used to analyze how readable text is. It assesses how many years of education the average person needs to have to understand a piece.

For more information on the SMOG framework, where it came from and why it's useful, see our blog on the topic [here](https://readable.io/blog/how-did-the-smog-index-become-a-crucial-readability-formula-for-content-writers/).