All about Jack Dorsey

Square small business payments service launches in UK

Social media users 'finally waking up' to cyber attack threats, study finds

Images and other media no longer count towards Twitter's 140-character limit

Twitter gives users more leeway with their 140 characters

New Twitter button allows users to share tweets with Direct Messages in two taps

Twitter fails to add new users in last quarter of 2015

Twitter fails to add new users in last quarter of 2015

Twitter boss hints at longer tweets - but says site will not lose its character

Twitter reports net loss as active user numbers stall

Twitter boss gives £128m shares to staff