Thankfully, Excel makes it easy to hide or unhide rows and columns, allowing you to declutter your spreadsheet and focus on the information that matters most.

Microsoft Excel’s sheet view collaboration feature is not new, but now it supports hiding rows and columns and applying groups.

You can hide and unhide rows in Excel by right-clicking, or reveal all hidden rows using the "Format" option in the "Home" tab.

On the other hand, to select non-sequential rows and columns to hide, press Ctrl as you click on the row numbers or column letters. How to Completely Hide an Excel Worksheet ...