I have a domain "example.com".
Where I had hosted a static html site then recently I switched to wordpress.
Now "www.example.com" is showing my current wordpress theme site whiel non-www "example.com" is showing the homepage of previous html page.
In webmaster I have set my preferred domain as "www.example.com" in my godaddy account I had not set any domain redirection.
And I am confused also as i remember it was showing new site even after installing WordPress but after installing Yoast SEO it happened. (I am not sure about this just a feeling).
Please let me know where I am doing wrong.
I redirect the link from my domain central from non-www to www and its fixed now.