Does it mean 'designated officially secret,' as Oxford says? If so, does it fit into the context?
Whether it is one day classified or not – it is clear that there are downsides to using social media platforms. Research has suggested that young people who spend more than two hours a day on social networking sites are more likely to report poor mental health. If you’re on Instagram, there are examples aplenty of overly-filtered simulations of life that are supposed to be ‘aspirational’ but instead make many users feel like we’re having a worse life than our peers. It’s of little surprise that Instagram was rated as the worst social media platform for young people’s mental health in a UK survey. Yet its audience is growing – there are now over 800 million users worldwide.