When providing habitat for local birds and fauna including water is essential unless you have a large body of water nearby. Placing birdbaths close to the house allows you to watch the activity from inside the house.
Once you put water into the garden containers need to be kept clean and filled regularly with fresh water. Birds are not interested in what the birdbath looks like from an aesthetic point of view but they are interest in function.
Provide containers with a range of depths and make sure the surface is not too slippery. Some birds such as wattle birds like to have a fair depth of water to dive into such as an old bath. Others like wrens and new holland honeyeaters manage with shallow terracotta saucers.
Place water where it is shaded during the heat of the day and has good visibility so predators can’t sneak up unobserved. Many birds seem to prefer to have shrubs nearby so they can fly to a branch and preen a bit before going into the water again. The lip of the container needs to be something the birds can grip onto while drinking.