A bridging visa is a stay permit, not an entry visa. It exists so that someone already inside Indonesia can change status onto a KITAS without flying out and applying again from abroad. It runs sixty days, it cannot be extended, and it is valid only while you remain in the country. Leave, and it lapses automatically, and the conversion starts again from outside. It is the mechanism behind in-country status changes onto a Working KITAS, a Spouse KITAS, or a dependent permit.
Visitors already in Indonesia who have been offered a role and need a Working KITAS
Foreign spouses converting onto a Spouse KITAS while already in the country
Children and other dependants converting onto a dependent permit alongside the sponsor