This Plugin is not compatible with K2. You can set the Meta Description Length and Robots Meta Tags.
Set Page Title (optional), Page Header Title Order (page/site title | site title/page title | page title) and Page Title Layout (frontpage title/site title | site title/frontpage title | frontpage title | site title).
Set Minimum Word Length, Number of Keywords and Static Keywords. Edit, add and delete keywords from an ignore list (blacklist). Choice to save Keywords and Description by article save. Choice of Title, Content or Both for Keyword generation. Choice of regeneration of All Keywords and save.