how to set featured image in non-wordpress
Use OpenGraph TAGs, especially og:image for the image! Read more at https://developers.facebook.com/docs/sharing/best-practices
seo
Safely redirect old WordPress blog links to new WP blog
My best bet would be to use plugins. There is a plugin for almost anything in WordPress. Try using this plugin – It has many downloads and good user reviews: http://wordpress.org/plugins/quick-pagepost-redirect-plugin/
What is the purpose of the “role” attribute in HTML?
Most of the roles you see were defined as part of ARIA 1.0, and then later incorporated into HTML via supporting specs like HTML-AAM. Some of the new HTML5 elements (dialog, main, etc.) are even based on the original ARIA roles. http://www.w3.org/TR/wai-aria/ There are a few primary reasons to use roles in addition to your … Read more