Twitter is still trying to make the site a kinder place, with fewer trolls and less abuse. Twitter's user base has been declining, and several celebrities have signed off permanently. The company, led by Jack Dorsey, has responded to complaints: "We are going to continue our work on making Twitter a safer place."

The latest attempt is a "quality filter," which Twitter explains on its blog:

"Turning it on filters lower-quality content, like duplicate Tweets or content that appears to be automated, from your notifications and other parts of your Twitter experience. It does not filter content from people you follow or accounts you've recently interacted with – and depending on your preferences, you can turn it on or off in your notifications settings."

Twitter frames the new features as ways to "Control Your Experience on Twitter." In addition to the filter, users can limit their notifications, for example, from only people they follow.

Discussion Starters:

• How well is Twitter addressing criticism of bullying and harassment on the site? To what extent will these features address concerns?
• How well did Twitter present the change on its blog?