Twitter faced a tough day on Thursday.

Twitter’s shares dropped nearly 21% on Thursday, wiping out almost half of the gains made by the stock earlier this year. The social media giant reported a 9% increase in third-quarter revenues, falling well below what investors had anticipated. Twitter attributed this setback to issues with its advertising products and lower demand for advertising during the summer. As a result, Twitter has revised its revenue predictions for the fourth quarter downwards. The company acknowledges that it will take some time to address its advertising challenges.

Twitter now anticipates revenue between $940 million and $1 billion for the final quarter of 2019, a figure that is likely to fall short of Wall Street’s previous projections. Prior to Thursday’s market opening, Twitter shares had surged 35% for the year, but they are now only up by 9%. Profits also fell significantly below expectations.

Despite the negative news, there are positive signs for Twitter in the future. One key metric, user growth, remains strong. As reported by CNN, Twitter has added 6 million new users since Q2 and has seen an increase of 21 million users compared to the same period last year. While Twitter’s momentum may have slowed, the company is still in a stable position. Twitter has cautioned investors that the challenges they are currently facing are likely to persist for the remainder of 2019 and possibly into 2020. Nevertheless, user growth remains robust, and there have been enhancements in capital investments.