Blink is a web content rendering engine developed by Google with contributions from Microsoft, Adobe, Intel, Samsung, IBM and others. It is used by the free software Chromium project and a large amount of web browsers based on it such as Google's Chrome browser, Brave, Falkon, Microsoft Edge, Opera and many others.
Google wanted more control over it's Google Chrome rendering engine so they forked the Webkit rendering engine and made it their own. The fork was announced in April 2013. Webkit itself is a Apple-controlled fork of the KDE project's KHTML rendering engine used by KDE's Konqueror web browser.