The "Merge" function in Excel helps to combine two or more adjacent cells into one cell. This is particularly helpful when dealing with lengthy texts or titles that are too long to fit in a single cell. The merged cell's size automatically adjusts to accommodate the combined text. When you use the Merge function, the content from the upper-leftmost cell in the selected range will be preserved, and all other contents from the remaining cells will be removed. This function is located in the "Home" tab under the "Alignment" section in the ribbon.