A sliding window is a type of window with two or more glass panels that open by sliding horizontally along built-in tracks. Instead of swinging outward or inward, one panel slides past the other, making it ideal for areas with limited space. Sliding windows are durable, easy to operate, provide excellent ventilation, allow plenty of natural light, and require minimal maintenance. They are commonly made with aluminum or uPVC frames and are widely used in residential, commercial, and office buildings because of their modern appearance and space-saving design.