Go to Setup and search for "Process Builder". Click the resulting link and you'll be brought to the builder itself (which in a way seems very separate from Salesforce but it's more like diving deep into the platform).
Once it loads, you'll see some existing processes (2 of which are just samples). You want to click New on the right hand side of the page.
Give the process a name and description...
Once saved, you'll now get the "flow chart" designer that allows you to define the process including the object it's working on (triggered by), the criteria and the actions.
Click "Add object" to choose which object this is triggered upon. Here we will chose the "Order" object (this object is fairly new and also has to be enabled - maybe a future tip on the orders....).
After clicking next, you can now select the criteria and set the criteria. In this case, we've chosen the criteria to be when an order equals draft. What I personally like is that you have the ability to have multiples like "Is Changed" and now "Equals" to actually create a "Changes to...." scenario.
Finally, add in the action or select the action of what happens when the criteria is met. Here it is an "Email Alert" where we'll chose the alert made in our previous tip.
Written by Prahba Krishnamurthy/Corey Babka