Magento 2 Ultimate SEO Optimizer extension is all in one pack of seven SEO Extensions for your store that significantly reduces your search optimization work load and cost. This extension gives you a combination of 7 powerful tools that automate your SEO tasks such as creating (1) SEO Meta tags (2) Image Alt tags (3) Rich Snippets (4) Sitemap (5) No-Follow No-Index tags (6) Canonical Tags (7) Multilingual Hreflang tags. This makes your online presence SEO equipped and improves your online rankings on SERPs.

https://www.fmeextensions.com/ultimate-seo-toolkit-for-magento-2.html
Key Features
Add Extended Google Rich Snippet Tags
Handle Content Language Duplicates with Hreflang Tags
Add No Index No Follow Tags to Any Page
Add Canonical Tags to Prevent Duplication
Auto-create SEO Meta Title, Description & Keywords
Generate SEO Optimized Alt Tags for Product Images
Build XML & HTML Sitemaps for Store
https://www.fmeextensions.com/