Dowsing is an ancient practice, it is the same basic principal as water divining, both have been used forever. I use dowsing in the production of Flower Essences all the time, it helps me to choose the essences I need to make and which essences I should prescribe to others. It is a way to connect to your Higher Self and gain pure true answers. Dowsing is not something you can use for self serving or egotistical reasons, it only really works when you are asking to help others.
Anyone can do it, it just takes a bit of practice, which helps you to gain the trust in your pendulum and the answers it is giving you. You can only ask closed questions, which require a Yes/No answer, and that takes a while to get used to. But, for helping you make Flower Essences and selecting them for someone else it is an invaluable tool, one I could not be without.
Below is the link to my Vlog where I explain the best way to choose a Pendulum and get started with Dowsing.