A strong desire to have the inner world connect with the real world seems to be the motivation. This may be through a need for human life to have meaning and connection with a wider, invisible, life.
The evidence of thousands of dreams suggests that searching for meaning in this direction is misplaced. Meaning arises from a love or acceptance of the many aspects of oneself, and thus the expansion of awareness into what was unconscious. While there may be valid cases of dcjd vu, they are rare.
What Does Deja Mean In Dream?