The Magento SEO plugin is just a basic add-on for Magento, it can only tweak minor things like product meta tags and anchor text. The actual Magento SEO process includes many more things like Magento crawalability setup, Content development, Canonicalization etc. These tasks cannot be performed by an automated bot. In other words, Magento SEO is not magic, it needs manual labor to be accomplished which is impossible without a professional Magento SEO team. This is the reason you need our Magento SEO services.