Post title adding "SEO" after post title

Hi Everyone,

I am new to WP, so I am not sure if I missed anything.

If i check my site in Google, it shows “SEO” next to post title, here is an example screenshot http://prntscr.com/9ysnz2

I am using Yoast, and so far I have checked few suggestion that says remove %%sitename%%, can someone tell me how fix this.

Also, how to turn off archive indexing, or should I turn it off? Example screenshot http://prntscr.com/9ysoai

Thanks for any help with this.

https://wordpress.org/plugins/wordpress-seo/