Search optimisation
www and non-www
www and non-www resolve to one canonical host via 301
What we check
www and non-www resolve to one canonical host via 301
Why it matters
Two hosts serving the same site work as two separate websites.
How to fix it
301-redirect one host to the other.
How it affects your score
This check sits in Search optimisation, which is worth 25% of the overall score. A critical result costs the full weight of the check; a warning costs half. If we can't measure it on your page, we leave it out of the score entirely.