Reason for mentioning this: Bing’s web crawler seems to treat this as a hard requirement before considering indexing generated pages. Google will happily consider indexing at least some pages.
Could we start a discussion about which useful / meaningful descriptions could be added to each category of generated page?
There is a good argument that this would not be an improvement. In fact, it seems counterproductive.
The Bing search engine has been consistently failing to gain significant market share since it was introduced. As of February 2023, the worldwide search engine market share of Bing is down to 2.81%.
But the categories in the description strings are a huge can of worms. Managing it is like the Citations and the Photo metadata. Selecting categories and terms is a unending commitment.