Perhaps the best we can do with measuring marketing performance ROI is to employ the age-old statement made by John Wanamaker more than 90 years ago, "Half the money I spend on advertising is wasted; the trouble is I don't know which half."
Hopefully, we can do better than Wanamaker with our modern tools such as marketing automation integrated into CRM or the ubiquitous spreadsheet with pivot tables. When evaluating data to determine KPIs, at some point, someone has to decide how to attribute a closed opportunity. If the last touch before a closed opportunity was a trade show, does that mean the revenue should be associated with the trade show? In this modern age of buying behavior, we can never really know, nor should we try, to attribute revenue to one particular source. Thus, are we back to a modern version of Wanamaker's interpretation?This is not to say we should not bother to measure. Rather than basing decisions on a rigid revenue attribution model, I suggest marketers rely on trends and benchmarks.
These are my top 10 key performance indicators (KPIs) for evaluating the performance of marketing and sales strategy and tactics. The first 5 are meant to be the metrics you use when presenting results to the external (external to the marketing team) stakeholders. The second 5 are meant to be used internally by the marketing team in evaluating activities, promotions, events, campaigns, etc.
KPIs to use when presenting to C-suite stakeholders:
Always talk to your C-suite stakeholders about revenue-based KPIs. They don't care about clicks, open rates, form conversions, or other marketing tactic metrics.
NEVER volunteer cost metrics to the C-suite! If you use 'cost per' metrics for your executive presentation, don't make this your signature KPI model. If you consistently talk about cost metrics such as cost per lead, cost per new contact, or cost per booth visitor, you, your budget, and your team will become embedded in the company culture as a big expense. And, we all know what gets cut first when times turn tough.
Cost metrics are most appropriate and essential to measure sales and marketing performance. Keep these metrics internal to the teams.
KPIs to use with the sales and marketing team stakeholders:
Cost per new contact - This is the total expenses of sales and marketing divided by the number of new contacts created. You can modify the amounts as needed such as to include or not include cost of travel or cost of salaries. The key point is to watch the trend from month to month.
Cost per lead - This is the cost per qualified lead. Use the same cost amounts and the same formula you use for cost per new contact. You will have to make a decision on the definition of a lead.
Cost per Click (CPC) - Divide the total cost of marketing spend by the number of clicks on ads or emails. CPC is a good measure to benchmark the cost of engagement with emails or ads. It is the best measure to compare any of the myriad marketing digital activities to each other. After a while, you'll be able to reject activities that don't meet your benchmark and do more of those that exceed your benchmark.
Cost per Thousand Exposures (CPM) - Divide the cost of an ad by the number of views and muliply by 1000. This is a good measure to determine reach. Cost per click and cost per thousand exposures should be considered together when evaluating the results of activities.
Click through Rate (CTR) - Another good benchmark for comparing the effectiveness of materials and venues. The CPC, CPM, and CRT together help the marketer make decisions about effectiveness.
Funnel conversion metrics - MQL to SAL to SQO to Closed/Won and other relevant conversions.
Revenue/Cost per attendee - These are good specifics for evaluating the effectiveness of events like trade shows, conferences, or seminars. Be cautious of making binding decisions based only on these metrics. There are likely to be intangibles that should be considered such as the salesperson's opportunity to see multiple customers and prospects in a short span of time.
Naturally, your particular business or organization may require different metrics depending on what you are selling. For example, those firms that are selling subscription services may track annual contract value and churn rate.
Final advice; avoid vanity metrics or metrics where the only purpose is to help you and your marketing team feel better about yourselves. An example of a vanity metric could be Facebook 'Likes', LinkedIn post views, or email open rates.