Digital Marketing KPIs: The Key Metrics for Your Business
By Manuel Cosini · December 10, 2025 · 5 min read
Digital marketing generates data continuously and at volumes that would have been impossible to process a decade ago. Every campaign, every click, every site visit, and every conversion leaves a measurable trace. The challenge is no longer collecting data: it is knowing which digital marketing KPIs truly matter for your business, how to calculate them correctly, and how to visualize them in a Power BI dashboard that enables fast decisions about investment and strategy.
In this article we cover the key indicators of digital marketing, organized by analysis dimension, with their formulas, reference benchmarks, and a guide for structuring the marketing dashboard in Power BI.
The problem with measuring marketing using fragmented data
Most marketing teams work with at least six to eight platforms simultaneously: Google Ads, Meta Ads, Google Analytics, a CRM, email marketing tools, social media platforms, and sometimes SEO platforms too. Each generates its own report with its own metrics and definitions — often inconsistent with each other (what exactly is "conversion rate"? Is it Google Ads' or the CRM's?)
Power BI solves this by connecting to all these sources and consolidating the data into a single unified data model. From there, KPIs are calculated using consistent formulas applied across all channels, and the team gets an integrated view of marketing performance without manually cross-referencing data between platforms.
The most important digital marketing KPIs
Below are twelve essential indicators organized by area of analysis.
1. Cost per click (CPC)
The average cost the company pays per click on its paid ads. It is the most basic efficiency KPI for digital advertising and helps compare performance across campaigns, ad groups, and platforms.
Formula: Total ad spend / Number of clicks
2. Cost per lead (CPL)
How much it costs to generate a lead (a potential customer who submitted their contact information). The key efficiency KPI for demand generation campaigns, and allows evaluating whether ad spend is generating contacts at a sustainable cost.
Formula: Total spend / Number of leads generated
3. Click-through rate (CTR)
The percentage of people who saw an ad (or email, or organic result) and clicked on it. A high CTR indicates that the message and creative are relevant to the audience.
Formula: (Clicks / Impressions) × 100
4. Conversion rate
The percentage of visitors or leads who complete the target action (purchase, registration, download, contact request). The most direct indicator of the marketing funnel's effectiveness.
Formula: (Conversions / Visitors or leads) × 100
5. ROAS (Return on Ad Spend)
The return generated for every dollar spent on advertising. The ROI-specific KPI for paid campaigns, which allows directly comparing the performance of different advertising investments.
Formula: Revenue attributed to advertising / Ad spend
6. Customer Acquisition Cost (CAC)
The total cost of converting a lead into a customer, considering all marketing and sales investment involved. Combined with customer LTV, it determines the profitability of each acquisition channel.
Formula: (Total marketing + sales spend) / New customers acquired
7. Email open rate and click rate
Two fundamental KPIs for the email channel: open rate (how many recipients opened the email) and click rate (how many clicked on a link within the email). They allow evaluating the relevance of subject lines and content.
Open rate formula: (Emails opened / Emails sent – Bounces) × 100
Click rate formula: (Clicks / Emails delivered) × 100
8. Organic traffic and SEO ranking
The volume of visits from unpaid search results and the average position in Google results for target keywords. The long-term visibility KPI for the business in search engines.
Formula: Organic sessions in period / Organic sessions in previous period × 100 (% change)
9. Bounce rate
The percentage of visitors who land on the website and leave without interacting with any other page. A high bounce rate may indicate that the content or landing page experience is not relevant to the user who arrived.
Formula: (Single-page sessions / Total sessions) × 100
10. Customer Lifetime Value (LTV)
The total value a customer will generate for the business throughout their relationship. Allows determining how much it makes sense to invest in acquiring that type of customer and evaluating the sustainability of the acquisition model.
Formula: Average order value × Purchase frequency × Average relationship duration
11. Social media engagement rate
Measures the level of interaction (likes, comments, shares, saves) of posts relative to reach or follower base. Indicates how relevant and valuable the content is to the audience.
Formula: (Total interactions / Reach or followers) × 100
12. Share of Voice
The proportion of digital conversation or search engine visibility that the brand holds compared to competitors. A strategic positioning KPI that indicates how much space the brand occupies in the digital consumer's mind.
Formula: (Brand mentions/impressions / Total industry mentions/impressions) × 100
Reference table: KPIs, formulas, and benchmarks
| KPI | Simplified formula | Reference benchmark |
|---|---|---|
| CPC | Spend / Clicks | Varies by industry and platform |
| CPL | Spend / Leads | Varies by sector and channel |
| CTR | Clicks / Impressions × 100 | 2–5% (Search); 0.5–1% (Display) |
| Conversion rate | Conversions / Visitors × 100 | 2–5% (ecommerce); 5–15% (landing) |
| ROAS | Revenue / Ad spend | > 3x (minimum sustainable) |
| CAC | Total spend / New customers | LTV/CAC > 3x |
| Email open rate | Opened / Sent × 100 | 20–35% (varies by industry) |
| Email CTR | Clicks / Delivered × 100 | 2–5% |
| Organic traffic | Organic sessions in period | Month-over-month growth |
| Bounce rate | Single-page sessions / Total × 100 | < 40% (blog); < 60% (landing) |
| Engagement rate | Interactions / Reach × 100 | 1–5% (Instagram); 0.5–2% (LinkedIn) |
| Share of Voice | Brand mentions / Sector total × 100 | Defined vs. competitors |
How to build the marketing dashboard in Power BI
Power BI has native connectors for the major digital marketing platforms: Google Analytics 4, Google Ads, Meta Ads, LinkedIn Ads, HubSpot, Mailchimp, and more. This allows building a unified data model where all KPIs from all channels coexist in the same report with consistent definitions.
Cross-filtering is particularly powerful in a marketing dashboard. Clicking on a specific campaign causes all KPIs on the report (clicks, conversions, revenue, ROAS, CPL) to recalculate to show only that campaign's data. Filtering by a time period — for example, the last two weeks of a seasonal campaign — updates all indicators across all channels simultaneously. This completely eliminates the need to build separate reports per campaign, channel, or period: all analysis happens in the same dashboard with interactive filters.
A recommended structure for the marketing dashboard includes: an acquisition view (traffic by channel, CPC, CTR), a conversion view (conversion rates by channel and campaign, CPL), a retention view (engagement, email, purchase recurrence), and an ROI view (ROAS, CAC, LTV/CAC ratio). Each view can be consulted independently or filtered by date, campaign, channel, or audience segment.
To see how we implement this type of dashboard, visit our marketing products for Power BI page.
How digital marketing KPIs relate to each other
Marketing KPIs form an analysis funnel that runs from visibility to profitability:
- A high CTR with a low conversion rate indicates the ad is attracting clicks but the landing page or offer is not convincing users. The problem is not the creative — it is the funnel after the click.
- A high ROAS with a low LTV/CAC ratio may mean campaigns are optimized for first purchase but not for retention, making the model unsustainable in the long run.
- A high email open rate with a low click rate indicates that the subject line is compelling but the content or call to action is not generating sufficient interest.
- Growing organic traffic combined with a high bounce rate may indicate that SEO is attracting unqualified traffic that does not match the business's target audience.
Want a dashboard that unifies all your marketing channels?
Explore our marketing dashboard for Power BI, with all KPIs integrated and connected to Google Ads, Meta, HubSpot, and more.
See the Marketing Dashboard →Frequently Asked Questions
- What are the most important digital marketing KPIs?
- The most important digital marketing KPIs include ROAS (return on ad spend), CAC (customer acquisition cost), conversion rate, and CPL (cost per lead). CTR, customer LTV, and email open rate are also essential, as they allow evaluating performance across the entire marketing funnel from awareness to retention.
- How is ROAS calculated?
- ROAS is calculated by dividing the revenue attributed to advertising by the ad spend during the same period. A minimum sustainable ROAS is 3x, though the target varies depending on the business's profit margin. A ROAS below 1 means the campaign is generating less revenue than the amount invested.
- Why use Power BI for a digital marketing dashboard?
- Power BI has native connectors for Google Analytics 4, Google Ads, Meta Ads, HubSpot, Mailchimp, and other platforms, enabling all marketing data to be consolidated into a single unified model with consistent definitions. Cross-filtering allows analyzing any campaign, channel, or time period with a single click, eliminating the need to manually cross-reference reports across platforms.