There are 6,000 tweets sent a second. In the time you have read this sentence, 42,000 tweets will have been sent. At an average of 34 characters per tweet that’s 1,428,000 characters.
Worldwidewebsize daily estimates the size of the internet. On the day of writing, it amounted to 4.59 billion pages and a billion websites. This is the “indexed” internet, and doesn’t include the “dark web” or private databases.