Following sharp money can be advantageous when you identify consistent patterns of line movement that suggest informed betting, especially if the sharp action is contrary to public sentiment. This can indicate a value opportunity, as sharp bettors typically rely on data-driven insights and can have an edge over casual bettors. Conversely, going against perceived smart money may be advantageous in situations where sharp action doesn't align with your own research or insights, particularly if you believe the line movement is an overreaction to transient factors like injuries or weather.