Merging combines two or more cells to create a new, larger cell. This is a great way to create a label that spans several columns. In the example here, cells A1, B1, and C1 were merged to create the label “Monthly Sales” to describe the information in rows 2 through 7. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.