The Smart Tag indicator is a purple triangle in the bottom right corner of the cell letting you know a Smart Tag is available. It indicates that Excel can take certain actions on the data; the action depends on what data is in the cell. You can attach smart tags to dates, financial symbols, names, and many more entries.
red triangle
purple triangle
Purple Triangle :)
smart tagssmart tagSmart tag -.-
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cell
It indicates that there is a comment in the cell.
The Mode Indicator, which will show the word "Ready".
The ! symbol. For example: =Sheet1!A1
Smart Tag~
It is on the Insert tab on the Ribbon.
Lok for a small plastic tag stapled to the end of the board, or a staple and the remains of the tag. Green tint to the wood is a POSSIBLE indicator of treated lumber.