This introduction is a practical resource for unions who are running small to medium sized online campaigns, operated by one or two people who are not experts in online campaigning. It is a how-to that will help your union win your campaign -- online and offline.The guide covers: * email campaigning* campaign web design and optimisation* databases and analytics* social media campaigning and advertising* online campaign strategy and planning* digital fundraising for unionsThis guide may also be read by a union leader who wants to get an overview of digital campaigning and contemporary best practice, but who will not necessarily be running the campaign.Digital organising can amplify and supercharge traditional organising, and it should be seen as an force-multiplier, not a replacement. However, many unions may not know where to start or how to make sense of consultants and vendors pushing a particular service or product. This guide is written in plain English, without jargon, and is the essential toolkit for your union to start winning online today.