Upskirt images and messages glorifying violence are among the types of content Twitter is moving to crack down on with a harder set of rules on banned speech.

The social media company has released a new set of guidelines dictating what types of content or accounts it will suspend. CEO Jack Dorsey previewed the forthcoming rules last week by ruing that “we see voices being silenced on Twitter every day” and vowing to take a “more aggressive stance”.

“Today we saw voices silencing themselves and voices speaking out because we’re *still* not doing enough”, Mr Dorsey wrote on Friday, an apparent reference to a mass boycott of Twitter after the site temporarily suspended the account of an actress, Rose McGowan, who has publicly alleged that producer Harvey Weinstein sexually assaulted her. Dozens of women have come forward to accuse Mr Weinstein of harassment and assault. Mr Weinstein has denied that any sexual relations were non-consensual, and his legal team have called other allegations "false".

Critics have long assailed Twitter for its lax approach to some content, saying it doesn’t do enough to suppress sexual harassment and hate speech. The new rules take aim at both, saying the result will be more abusive content getting removed.

An email to members of a Trust and Safety Council laying out the new approach was first reported by Wired, whose story Mr Dorsey referenced in a tweet.

People who post non-consensual nude images - both those who initially tweet such images and those who share them with the intent of harassing victims - will be permanently booted from the platform, whereas before first-time offenders faced temporary suspension. Twitter is broadening its definition of “non-consensual nudity” to encompass upskirt imagery, hidden camera content and “creep shots”, according to the email.

11 useful Twitter features you might not know about Show all 11 1 /11 11 useful Twitter features you might not know about 11 useful Twitter features you might not know about Turn on Night Mode Twitter’s dark blue Night Mode is a lot easier on your eyes than its regular, vibrant theme. On the site, you can enable it by clicking your profile photo (on the right-hand side of the bar at the top of the screen) and selecting Night Mode. On Android and iOS, you need to tap your profile picture at the top of the screen and select Night Mode. 11 useful Twitter features you might not know about Lengthen your tweets A “small group” of users are no longer restricted by Twitter’s 140-character tweet limit. Even if you’re not a chosen one, you can double your limit to 280 characters on desktop by downloading the Tampermonkey plugin, going to https://gist.github.com/Prof9/c16fc4997e0ef5b22a15c43edd7f5f49, clicking Raw and then Install. 11 useful Twitter features you might not know about Improve search Twitter’s regular search tool can be a little messy, but Advanced Search makes it much easier for you to find specific things. Go to https://twitter.com/search-advanced and filter your search by word, hashtag, exact phrase, location, date and account. 11 useful Twitter features you might not know about Disable read receipts Like WhatsApp and Facebook Messenger, Twitter’s direct messaging service shows you when your messages have been seen by the person you sent them to. You can disable read receipts though. On Android, iOS and the site, go to Settings and Privacy, click on Privacy and Safety and disable read receipts. 11 useful Twitter features you might not know about Monitor your tweets Retweets and Likes only form part of the story, as far as tweet engagement is concerned. You can view a lot more information about how people have reacted to your updates, including the number of times they’ve been seen and the number of times people have interacted with them. Just open your tweets and hit the View Tweet Activity button. 11 useful Twitter features you might not know about Trim the fat If you feel like you’re drowning in push notifications, you can cut down the number you receive from Twitter by going to Settings, Notifications, Push Notifications and deselecting the types of notifications you wouldn’t like to receive. You can also enable sleep settings, which allow you to switch off all mobile updates during certain hours of the day. On the site, go to Settings, Mobile and select your hours. 11 useful Twitter features you might not know about Save data You can stop videos from playing automatically on desktop and the Twitter app. On the site, you can do this by going to Settings, Account, Video Tweets and unchecking Video Autoplay. On both the Android and iOS versions of the app, go to Settings, General, Data Usage, Video Autoplay, and choose between Mobile data & Wi-Fi, Wi-Fi Only, and Never. 11 useful Twitter features you might not know about Save even more data You can save even more data and completely transform your timeline in the process by disabling images. Just go to Settings, Data Usage and uncheck the Image Previews box. 11 useful Twitter features you might not know about Customise your profile Editing your Twitter profile is really straightforward, just go to your profile and click the large Edit Profile button. However, there’s one customisation option that’s easy to miss. As well as your name, bio and profile photos, you can change your colour scheme. The option is only available on the Twitter site, and is sandwiched between the Website and Birthday sections. 11 useful Twitter features you might not know about Browse properly One of the Twitter app’s most annoying features is its in-app browser, which links automatically open up in. You can sacrifice it for your favourite mobile browser by going to Settings, Display and Sound and unchecking the Use In-App Browser box. 11 useful Twitter features you might not know about Subscribe to tweets You can set up alerts that let you know whenever a certain account tweets, but it’s a two-stage process. First, on the app, go to Settings, Notifications, Push Notifications, Tweets and turn the toggle button on. Then open the profile page of the account you want to receive notifications from, tap the Bell icon next to the Following button and choose between All Tweets, Only Live Video and Off.

On the topic of “unwanted sexual advances”, the email is more vague. The site said it would continue to act “when we receive a report from someone directly involved in the conversation”, though it pledged to roll out improved reporting tools.

Some users criticised that strategy for suffering from the same shortcomings they say plague Twitter's current approach to abuse - the fact the self-reporting system is deemed ineffective by some.

Hate speech has become an unavoidable topic for dominant social media hubs like Twitter and Facebook in the months since a neo-Nazi protest in Charlottesville spiraled into bloodshed, with Silicon Valley at large under heightened pressure to stifle the spread of hateful creeds.

Twitter said it would begin treating hate symbols as “sensitive media”, though the exact implications were yet to be determined, and would “take enforcement action against organizations that use/have historically used violence as a means to advance their cause”.