"Go" the language is tricky to search for as just the word "go", so I wouldn't read much into that. Many job ads contain the word go, but have nothing to do with go the language. e.g. "...go to our website..." "...go above and beyond..." etc.

The extra keyword 'go' that you added will return all job postings that have any occurrence of the word 'go' in their description. See for another example: https://www.indeed.com/jobtrends/q-scala-q-golang-q-descript...