How do I measure marketing ROI (Return on investment)?

All the digital marketing networks, tools, and efforts must be measured.

 Google Analytics is the most reliable source for measuring marketing efforts.

 To calculate marketing ROI, you must first understand your marketing objectives and expenses.

 From there, it's only a matter of subtracting the measurements from the intrinsic cost (meaning Intrinsic value is a measure of what an asset is worth. This measure is arrived at by means of an objective calculation or complex financial model, rather than using the currently trading market price of that asset. ) to get your ROI.