The area of your life most affected will depend on your own individual chart. In general however the ground covered is partly in Sagittarius (review your beliefs) and partly through Scorpio (review existential questions).
For me on a personal level this is taking place in an area which firstly concerns my personality and ego and then dips deeply into my subconscious. I expect to feel some very profound shifts during this time! Since our thoughts drive what manifests or is magnetised into our lives, I embrace this period of time as one of introspective growth leading to a new vision of the future based on firmer foundations.
However it works for you, remember one thing... be kind to yourself!