Does Google ignore anchored text in SEO optimization?

[propel]

Hi there

Currently, I'm using Surfer SEO for my website optimization. 

While optimizing this collection page(https://propel-the-world.com/collections/climate-change-t-shirt) with the tool, I found that a recommended keyword like "world" is marked as not existing even though I used it in the title of the product. 

I asked Surfer SEO about this and they said it is not considered since it is anchored content. 

So I started to wonder does Google actually ignore the anchored content. Is there any critical material or explanation about that? 

If anyone knows, please tell me.

Thank you in advance.