The most important mistake is to enter the marketing process and start serving without knowing who you are addressing. This can waste all your budget and time. Another common mistake is to develop the entire strategy based on a single data type. As we mentioned before, you need a large dataset. You will use this dataset later to do a very detailed analysis. Not understanding what the focus group wants is another common mistake. This error is usually caused by being biased and ignoring the data. If you do not want to experience such a problem, you need to rely on data results in customer and target audience analysis.