Some ads on free streaming sites are part of "malvertising" campaigns. These ads can carry malicious code that downloads onto your device without your knowledge (a "drive-by download"). This malware can include spyware, ransomware, or viruses. Phishing Scams
"I searched for 'Ogomovies ad free' and found a fake APK. I installed it. Now my Instagram is sending spam DMs to all my friends. Don't do it." — ogomovies ad