Applying thermal paste to a CPU is a crucial step in assembling a computer. Thermal paste helps to transfer heat from the CPU to the heatsink, which is necessary to prevent the CPU from overheating. Without thermal paste, the CPU could quickly become too hot and could even be damaged.
There are a few different ways to apply thermal paste, but the most common method is to use a pea-sized drop of paste in the center of the CPU. The paste should then be spread out evenly over the entire surface of the CPU using a cotton swab or a credit card. It is important to avoid using too much thermal paste, as this can actually impede heat transfer.