Personalize and customize your story discovery experience</li> <li>Measure your use and overall satisfaction with our Services</li> <li>Calculate anonymous, aggregate statistics to better understand our users, improve our Services, and develop new features</li> <li>Investigate and prevent reported issues, illegal activity, and breaches of our terms of service</li> <li>Help prevent spam, fraud, abuse, and other prohibited activity</li> <li>Display relevant, tailored advertisements and improve your ad experience, <u>except where your separate consent is required</u> </li> <li>For security purposes</li>