YSP comes with a redirect manager so you can fix crawl errors (broken URLs caused by changing permalinks, deleting pages, etc).
Yoast SEO Premium allows you to set multiple focus keywords (up to 5) but there is a SPECIFIC STRATEGY for doing this. If you Google both keywords you should expect to find the same information (called search intent). Then when writing your article headline, your primary keyword should usually be included as an exact match while your secondary keyword should be included as a partial match.
Doesn’t it annoy you, when you share your blog post on Facebook and the wrong image appears? With Yoast SEO you can check what your post will look like on Facebook or Twitter, without even going to these channels. While working on your post you can just go to the Yoast SEO meta box, upload the image you’d like to show, and make sure it will look fine.