The Include in filters field setting allows the field to be added as a filter for content (see Channels Configuration) and the field values to be edited in the Batch Editor (indexed fields). Fotoware Alto checks this setting against the allowed number of search-indexed fields in your subscription plan. While it may be tempting to include all fields in filters and simple searches, and also boost them, you may want to revisit this idea based on your subscription plan limit and by testing your common search scenarios. Too many values will not automatically result in better search results.