Selection step filters are fixed filters that are linked to a particular selection level or selection step in a TSI. End users cannot activate or deactivate these filters themselves.

User filters are predefined filters that end users can activate or deactivate from the filter bar.

Fixed filters are predefined filters that are applied to reference fields in a business object. By using a fixed filter, you can limit the data displayed to the end user in a reference pop-up. End users will be unaware of a fixed filter being applied.