These threshold values will be utilized to measure presence analytics metrics and are applicable for all stores for the customer.
When site_id is passed, threshold is configured for that particular site(in this case select_all need not be passed). When select_all is passed, site_id need not be passed. If site_id and select_all query parameter are not passed then default threshold is configured for the customer. For simplicity threshold values are rounded off to nearest multiple of 5.