This gives you an idea of what you can do with 2GB of data - it is useful to know if you are going on holiday and will be using your phone more away from WiFi.
HOW MUCH IS 2GB OF DATA?
2GB of data (or 2000MB) a month is a plan aimed at those who don't use mobile data often, but is enough to browse the web for around 80 minutes a day, or use social media apps for at least around 40 minutes per day. However, it is not suitable for those who stream lots of movies, or want to watch a lot of other videos.
2GB data sample monthly usage:
80 minutes of daily web browsing
Or at least 40 minutes of daily social media
Or 45 hours per month of music
Or 3-4 films per month (low or medium quality)
https://3g.co.uk/guides/how-much-data-do-i-need