Use the Statistics & Report module in Tweakwise to view data on the use of your filters.
When you choose the Filtering submodule, you'll see the most used filters in your webshop. When you click a filter, you'll see al this datafor each value within that filter in the table below.
You can view the use of your filters for the entire instance, but you can also choose a category from the dropdown and view the data from just that category.
The number in the table signifies the number of requests that we received. If there has been a bot on your site crawling a certain filter, it will be visible in this module.
You can use all this data to make changes to your filter templates, filters and, for example, the sorting of your values within filters.