While you can have a stand alone concrete bench in the garden if you wish, you can also choose to build the benches into your garden. This means that you can create one or more areas around your garden for you and other people to sit down. This is ideal if you don't have a patio area on which to place a furniture set, but you still want some outdoor seating.
When choosing where to place the concrete benches, choose areas that are well-lit but which won't hinder the sun from reaching any plants. Take exact measurements of the area you wish to install a concrete bench, as you will likely want it to extend all along one side, so you'll need to order a bench which is the exact size.