Surprises refer to the difference between the actual numbers declared by a company (like revenue, EPS, net income, and EBIT) and its Forecaster consensus estimates (predictions) from analysts. 

The Surprises section on Trendlyne displays this difference as a percentage, which is referred to as the Surprise %. A positive Surprise % indicates the company has surpassed estimates, while a negative Surprise % means that it missed estimates. 

This section also provides insights into whether a company has achieved or missed analyst estimates for parameters like revenue, EPS, net income, EBIT, and more. 

Surprises help investors track how a stock's actual performance compares to market expectations. You can also track the Surprise % for previous quarters and years to assess the company's performance.