The list and gallery views of search results both display a dynamic button bar. For example:
This bar is built dynamically based on the content of the search result items.
Docxonomy analyses the text and imagery of the files that comprise the search results, determines which entities, nouns, verbs and image attributes are the most important to those individual files and then compares them across the result set.
The button bar represents the output of that analysis and comparison, showing the values that are the most important across the result set as a whole.
These values, in their own right, can help you uncover insights across your data and clicking them will result in further refining of the search results by applying the selected value as an additional filter.