The humankind has been trying to find the meaning of dreams for a very long time and even today we do not know much. Every culture, society, or tradition has a separate understanding and symbolization of a dream. A symbol or animal in a dream could mean safe and secure while it could be unsafe or dangerous in other beliefs. Many experts view visions as the active nature of the brain even when a person is sleeping it is busy processing and absorbing the actions of the day that reflects in the dream. However, the most popular and accepted theory is that visions hold the clue or shows the desires or fantasies of the subconscious mind.
Dreaming about animals means emotions, actions, and behaviors which may not be acceptable. It is the representation of repressed personalities that go unnoticed in the conscious mind. The brain helps in reviving it and playing it which emerges in the form of a dream. It is related to your reality, so whatever you feel, the things you cannot openly say, or your deepest desires get acknowledgment and interpretation through your dreams.
In ancient times, many people consider the spider as the symbol of growth, mystery, and power. Its meaning in a dream means so many other things depending on nature and actions that when you usually see a spider in your dream, it represents a stranger feeling in you towards a particular situation. Other interpretations also suggest that you want to stay away or keep a distance from enticing and appealing locations. Additionally, seeing spiders in your dream could also refer to the existence of a strong force shielding you from destructing yourself.