What is automation? It is the total or partial performance of technical tasks by machines operating without human intervention.
Whether you are new to coding or a proven programmer, you can automate some of your daily tasks at both the campaign and account management levels. Without even knowing it, you have probably already used several automation models! So we’ll see how to automate campaigns, from using Adwords tools to integrating scripts to creating automatic rules.
Source: http://learningjoan.com/internet/digital-marketing/tips-for-adwords-automation/