Working with tabs instead of one sheet at a time
Most people learn to add or delete Excel sheets one at a time, right-clicking a single tab and choosing Insert or Delete each time. Once a workbook needs several new sheets -- one per month, one per region, one per project phase -- that habit turns into a lot of repetitive clicking. Selecting the tabs first changes the scope of a single Insert or Delete command to match how many tabs are selected, so the same two clicks handle five sheets as easily as one.
A quick note on undo
Deleting a sheet in Excel usually can't be undone with Ctrl+Z the way most other actions can, and this is especially easy to forget when deleting several sheets in one action. Before right-clicking Delete, it's worth double-checking that every selected tab is genuinely something you no longer need, since recovering a deleted sheet afterward may not be possible.
Frequently Asked Questions
Can I select sheet tabs that aren't next to each other?
Yes -- holding Ctrl and clicking each tab individually lets you select tabs that are scattered across the tab bar, not just ones sitting next to each other.
Is there a way to undo a sheet deletion?
Not reliably. Excel's undo history often doesn't cover sheet deletion, so it's safer to keep a backup copy of the workbook before deleting sheets you're not fully sure about.