Write the scent, because the photo cannot
Every candle photo looks like every other candle photo. The description is the product page. Give each one the top, heart and base notes in plain words, say what it reminds you of, and say what room it suits. A person buying for a bathroom wants something different from a person buying for a desk.
Add burn time and wax weight. Those two numbers let a buyer compare your candle to the one they bought last time, and comparison is what makes a price look fair.
Sets sell better than singles
Three small candles in a box outsell one large one in most shops, because the buyer does not have to be right about the scent. Build a set as its own product with its own photo rather than asking people to add three things to a cart.
Say how it ships before they ask
Glass and post do not agree. Write into the description how the candle is packed: box, wrap, filler. One line about a double-walled box prevents the message that starts with is it well packed and ends with a refund argument.
Say the delivery window too. Candles are often bought as gifts against a date, and a buyer who knows it will not arrive in time buys something else instead of blaming you later.
Seasons are your calendar
Scent is seasonal in a way most products are not. Put the autumn range up before the weather turns, and retire it while people still want it rather than after they stop. A short range that sells out reads better than a long one that lingers.