The ideal number of product description keywords depends on the length and quality of your content, but generally, it's recommended to use 2-4 keywords per product.
It's also recommended to include keywords in your product title, and the meta description should be concise and accurately summarize the content of your page, including relevant keywords. However, don't overdo it with keywords as this can negatively impact your search engine optimization (SEO). The meta description should be between 50-300 characters.
Check out some of the great resources we have that focus on SEO:
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For product descriptions, I recommend >200 words. Also make sure to include your targeted keyword more than once in the product description, it really helps with the SEO.
There are tons of different rules like this for Title, Meta Description, Alt Text, & URL that can be implemented to improve Google ranking for each page. If you're interested, you can try our Shopify App: Seopro which has a knowledge of all these rules. Seopro runs a SEO audit on all of your Shopify Products and Shopify Collections to detect the SEO issues and helps you fix them. Also, there's a bulk update feature to fix all of your products in one click.
Full disclosure: I am the developer of this app. Feel free to reach out to me if you have any questions: firstname.lastname@example.org
Phil Girard - Livestream Labs
Shopify App Developer
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