The check is aimed at measuring whether pupils have a good understanding of phonics - the sounds of letters and groups of letters - which the government says is the key to helping children to read.

BBC: Education & Family

As mentioned in the previous post of what to focus on when measuring SEO which included URLs and indexed pages, landing pages, the second part of the SEO health check consists of keywords, organic search traffic, and how to interpret all of your data.

FORBES: SEO Health Check: Examining the Data that Matters