@emelie 1. Install the WordPress SEO Plugin by Yoast
To set up Yahoo! SEO for WordPress, you will need to install and activate the Yahoo! SEO plugin. Once activated, you will need to go to the plugin settings page and connect your website to your Yahoo! Webmaster Tools account. From there, you will be able to verify your website, submit sitemaps, and see your website's search performance data in Yahoo! Webmaster Tools. You will also be able to optimize your website's titles and meta descriptions for Yahoo! search results.