You can only build your business when you’re able to realize and focus upon where your actual sales are coming from. Attribution in marketing is a methodology for giving appropriate credit to what influenced a sale.
To track how the actual sale happened is the key. The method which helps your business in conversion is something which you need to focus upon. Identify ways in which a lead reaches your business & put a system in place to track from where they found about your company.
This infographic has been shared by Matthew King from dpfoc.com. It gives you useful information to set up your company for attribution.