Meta works differently from search in Sembawang. People are on Facebook and Instagram all day, but they are not looking for your service, so the ad needs a reason to act now.
The town is mostly HDB, with newer precincts near Canberra, and households, young families and older residents differ by block and by MRT station. That is why we build audiences around estates rather than one wide area.
Admiralty sits close to Woodlands, so the edge of the audience needs care to avoid paying for reach you cannot serve. Gambas is mainly industrial, so it suits business offers rather than home ones.
Licence lines such as CEA for agents, and NEA, BCA or PUB for trades, belong in the ad when they build trust. Budgets are in S$.