Can I know wat does the following statement mean?

For i = 161 To 301
If Trim(Cells(i, 7)) = "1" Then
Rows(i).Hidden = True
ElseIf Trim(Cells(i, 7)) = "True" Then
Rows(i).Hidden = True
End If
If Trim(Cells(i, 7)) = "0" Then
Rows(i).Hidden = False
End If
Next i

Basically, I dunno the meaning of Trim(Cells(i,7))
Can someone pls explain

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