Used primarily as a protecting group in organic synthesis, particularly for alcohols. It selectively reacts with hydroxyl groups to form stable silyl ethers, shielding them during subsequent reactions. This is especially useful in multi-step synthesis where specific functional groups need to be preserved. It is also employed in the preparation of complex molecules, such as pharmaceuticals and natural products, due to its stability under various reaction conditions. Additionally, it finds application in the modification of surfaces and materials, where its ability to form protective layers is leveraged.