There are 5 common mistakes or errors that you must have to avoid while setting up your Matomo Instance. First, ignoring goal setting can hinder your ability to track essential metrics and achieve business objectives. Disregarding data privacy and compliance could expose you to legal risks and erode trust. Avoid skipping regular maintenance and updates, as this can compromise performance and security. Don't neglect site search tracking, which offers valuable insights into user behavior. Lastly, ensure campaigns are tagged correctly to avoid inaccurate data and misleading reports.