Where is the data taken using the attribute "keyword" in advanced part search?

Summary:

Content (please ensure you mask any confidential information):

Hello,

I would like to know, in the advanced parts search standard of CPQ, using the attribute standard "keyword" where is the data taken?

Thank you,

Silvia

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):