Placing a bowl of salt by the window is a common practice in traditional feng shui and cultural beliefs, with a variety of reasons behind it. Here are some of the main benefits associated with this practice:

1. Purification of energy: Salt is widely believed to have natural purifying properties. By placing a bowl of salt near the window, it is thought to absorb any negative or stagnant energy in the space, helping to create a more balanced and peaceful environment. This can contribute to improved mood and harmony within the household.

2. Protection from harmful influences: According to some spiritual beliefs, salt acts as a protective barrier. Placing it by the window is said to prevent negative forces or evil spirits from entering the home. The window, being a point of connection between the outside world and your home, is seen as a vulnerable area that can be shielded by the salt.

3. Attracting good fortune: Many cultures believe that salt can attract positive energy, wealth, and good luck. By keeping a bowl of salt by the window, it is thought to invite prosperity, success, and good health into the home. This practice is often done in hopes of improving one's financial situation or ensuring overall well-being for the family.

4. Maintaining a clean atmosphere: Salt is also considered a natural cleanser. In this sense, the bowl of salt can help maintain a pure, fresh atmosphere inside the house, ensuring that both the physical and energetic spaces remain free from negativity or stagnation.

While these beliefs are rooted in cultural and spiritual practices rather than scientific evidence, they continue to be followed by many for the peace of mind, comfort, and symbolic meaning they provide.