Whatever house Neptune is in your chart is where you may find confusion, delusion, a spiritual connection, inspiration, creativity, serving others, escapism, or getting lost in boundless experiences. There also may be aspects to other planets, which can affect this too.
For the next dozen or so years, the world should expect a surge in all things spiritual or religion related. Expect much creativity in writing, arts and hidden things such as magic or the occult, as people will feel the need to express themselves in all sorts of new ways. Watch out for more use of drugs or escapist behaviors. But on the high side, look out for new healing techniques with an emphasis on a holistic and spiritual nature, including hypnotherapy. A stronger idealistic focus will be on social injustice, poverty and the environment, especially anything having to do with clean water or water in general.
If you are interested in finding out where Neptune is in your chart, and how it will be affecting your life, send me a note on my contact page and I will be happy to let you know!