Data type - Object

Object data type is refer to any objects in excel and store as 32-bit (4-byte) and Set statement must be use after declares otherwise Run-time error '91': Object variable or with block variable not set in syntax.

Syntax : Dim MyVar as Object
               Set MyVar = Object

Object can be any objects assigned to it for example: Workbook, Worksheet, Chart and etc
(Refer below link for Object model).

Below Example is to check whether active sheet is empty or not?

VBA Vode:

Option Explicit
Sub ToCheckActiveSheetEmpty()
    
    Dim MyWS As Worksheet
    Dim MyRng As Range
    Set MyWS = ActiveSheet
    Set MyRng = MyWS.UsedRange
    
    If WorksheetFunction.CountA(MyRng) = 0 And _
    MyWS.Shapes.Count = 0 Then
        MsgBox "Sheet " & """" & MyWS.Name & """" & " is empty", _
        vbInformation, "https://mrvba.blogspot.com"
    Else
        MsgBox "Sheet " & """" & MyWS.Name & """" & "  is not empty", _
        vbInformation, "https://mrvba.blogspot.com"
    End If

End Sub

Note: There are 2 objects inside the example. 1st Worksheet and 2nd is Range.

Read more about Object data type, excel training beginners, coding in vba,
excel training online, visual basic for applications at below links.

Microsoft Reference-Object-data-type
Microsoft Reference-Object-model

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Practice makes perfect.
Thank You.