Social media uses little data, unless video viewing is done frequently through social media channels.
Facebook offers a way to save data on their platforms. Change your video to SD and/or stop automatic video play. This is often referred to as “Data Saver”.
Below are instructions on how to change your settings on your Android device and then on your desktop computer. Apple isn’t as easy to switch, but here’s a helpful article for apple users on a few steps you can take to save data when using Facebook: Advice for Apple Users
Instagram does not have any Wi-Fi savings opportunities at this time.
Twitter does have a data saving option to limit data use. Follow the instructions below on an Android device, iPhone or desktop computer.