Key: b6ffb6699450271d58b12a01c1e6c5a2

Creates 301 redirects for any changes in permanent links (URLs). How much it is a sought-after feature and who needs it is difficult to say, but I have never used this plug-in feature. I mean, if I needed a 301 redirect, I put it in .htaccess. And it is not recommended to change the permanent links in the pages already published! And I don't think anyone does that. You can set up descriptions and keywords separately for each column and label. You can specify robots values: index, noindex, follow, etc. for each post or page individually. (for all kinds of index archives, noindex (indexing) is configured as well as platinum SEO)

All in One SEO Pack by and large does not have advantages, the only thing - it's paragraph 3 - integration with e-Commerce. Everything else: nonce protection, API, etc. are not so important. As for the canonical URL function (present in both plugins), this canonical meta tag has already been implemented in WordPress itself, starting with version 2.9.