A well-written listing usually specifies purpose (sale or rent), category and type, area figures (ideally carpet area, not just super area), configuration, floor and facing, along with possession status. Listings that are vague on these specifics are worth a direct follow-up question before you invest time in a visit.
Pay attention to how price is presented — a fixed figure, a display range, or "price on request" — since this affects how you should approach initial conversations with the seller or agent.
Photos and descriptions are a starting filter, not a substitute for an actual site visit before making any decision.