What is Statistical significance?

Statistical significance is a number which expresses how reliable is the data you have measured. Many people, who are starting their business, do not know the appropriate amount of time needed for a measurement. They usually take too little data and just assume the results. However, long-term measurements may bring different results. Because of this, many sellers lose a lot of money and business opportunities. Measuring the statistical significance is a good practice and helps you avoid mistakes. The recommended statistical significance is 95% and more.