Similar to Microsoft Excel, you can hide or unhide a sheet in Google Sheets. Please see below for details:
Step 1: Right-click the tab and click "Hide" from the dialog box;
Step 2: To unhide the sheets you hide before, you need to click the "View" tab from the ribbon;
Step 3: Click the "Unhidden sheets" tab from the ribbon;
Step 4: Select the hidden tab you want to show.