Meta keywords aren't really relevant anymore. It's a "nice to have". If you have it it's great, because Google isn't the only search engine in the world. But it absolutely does not impact negatively on SEO, unless you're padding it with unnecessary unrelated content, which is what Google wants to stamp out.
Search Engine Optimization
So I've been a bit curious about seo. However I'm not entirely sure how to approach it. Anyone have any tips on this? Also, anything in specific to NodeBB? Are there settings to for seo? Should there be? Just wondering!
NodeBB should already be optimised for best SEO value. Semantic HTML, proper meta tags, links back to canonical URLs and parent listings...
To be honest, you shouldn't have to worry about it, and if there's something we missed, it's just a pull request away from being available for everybody