My take on Data Privacy and how to protect it

We all have heard - Data is the new oil. Why is our data being compared to oil? Oil fuels an engine, what does data fuels? Broadly Data fuels targeted-ads, which is the most important cash-cow for the tech-giants that offers dopamine-driven essential free services. Like Google, Youtube, Gmail, GDrive, GPhotos, Whatsapp, Instagram, Facebook.