Q:

What is the difference between Sheets.Select and Sheets.Activate?

In VBA for Excel, what is the difference between Sheets.Select and Sheets.Activate ?

A:

The difference is in their flexibility.
Activate make the specified sheet the active sheet, and may only be applied to a single sheet
Select allow for optionally extending the currently selected sheets to include the specified sheet, eg
Worksheets("Sheet2").Select Replace:=False

and also allow for selecting an array of sheets
Sheets(Array("Sheet3", "Sheet2")).Select

In their minimal form Select and Activate do the same thing.
For example, if only one sheet is currently selected (say Sheet3) or if more than one sheet is selected but excluding say Sheet2, then Worksheets("Sheet2").Select and Worksheets("Sheet2").Activate both make Sheet2 the sole selected and active sheet.
On the other hand, if say both Sheet2 and Sheet3 are selected and Sheet2 is the active sheet, then Worksheets("Sheet3").Activate leaves both sheets selected and makes Sheet3 the active sheet, whereas Worksheets("Sheet2").Select makes Sheet3 the sole selected and active sheet.

A:

.activate is  you clicking on the worksheet tab.
.select simulates you doing a control and click on the tab. In VBA you're not in the sheet yet.
You can .select more than one sheet but .activate only one.

