WIX's SEO doesn't work anywhere near the level Wordpress works at. The blog SEO is even worse. I would suggest to be able to add keywords to individual blog posts. When making a search using a blog post's very specific title, it won't even show up on the first page of Google. You know what does show up though? My older blog on Wordpress.com with the same content. I don't know if Wordpress is able to achieve it because of key words or not but when I look at SEO settings for each blog post that's the one thing WIX is missing in the options.