Twitter is currently experiencing its slowest quarterly sales growth since 2013, according to a statement released by the company. Whilst revenue for the second quarter is up 20%, it is a huge drop from the 61% growth that it saw at the same time last year. However, the site did see a fall in its quarterly loss from 136 million US dollars last year, to 107 million dollars this year. Twitter has also seen a 3% rise in its monthly active users, which has led to an 18% rise in advertising revenue. The increase comes following a decision to free up its 140-character limit, which now allows users to include links, images and other tweets without taking up any character space.