Sagittarius sign is Significator of following things in Astrology

armories, barracks
battlefields, military places
challenging, radical changes
common, fiery, masculine
confrontation, not comfort
creates turmoil
directed
effective
dharma of the cosmic deity
achieving god's grace
high ideals, aspirations
religious, spiritual quest
purposeful, not peaceful
regimentation, sadhana
transmutation, upward bound
shooting ones arrow
transformations
spiritual wanderings