What Is Call Tracking and How Does It Help Businesses Avoid Wasting Their Advertising Budget?

A company spends its budget on Google Ads, social media advertising, SEO, and business directories. Form submissions are captured in analytics, but some customers call instead of filling out a form. If the same phone number is used across all channels, a marketer may see 100 calls in a month but have no way of knowing which campaigns generated them or how much each lead cost.

Call tracking fills this gap. By using separate virtual phone numbers, businesses can connect calls to traffic sources and then compare advertising spend with calls, leads, and sales. This is especially useful for businesses where a significant share of customers call before making a purchase.

What Is Call Tracking in Simple Terms?

Call tracking is a technology used to track phone inquiries and identify where a customer came from. Depending on the setup, the system can show the channel, campaign, ad, or keyword that led to the call.

For example, a user visits a website after clicking an ad. They see a tracking number on the page and make a call. The call is routed to the manager’s regular business line, while the system records the available data about the advertising source.

As a result, analytics can show the full connection: ad → website visit → call → call outcome. Google Ads uses a similar approach with call conversion tracking, which allows phone conversions to be associated with campaigns, ads, and keywords.

How Number Replacement Works in Call Tracking

Call tracking can be static or dynamic. The difference depends on how precisely a business needs to identify the source of a call.

Static Call Tracking

A separate phone number is assigned to each source. For example, a company can use one number in its Google Business Profile, another in an industry directory, and a third for outdoor advertising.

If a customer calls the number listed in the directory, the source of the inquiry is already known. This approach works well for comparing individual channels and does not require replacing the number for every website visitor. Its limitation is the depth of analytics: a single number assigned to Google Ads will not show which specific campaign or keyword generated the call.

Dynamic Call Tracking

For more detailed attribution, businesses use a pool of phone numbers together with dynamic number insertion. The system automatically displays different numbers to website visitors and temporarily associates each number with a specific session.

For example, an online store may receive traffic from organic search and dozens of advertising campaigns at the same time. One user arrives through a Brand Search campaign, while another comes from an ad for a specific product category. If both users call, dynamic call tracking helps distinguish between these inquiries and retain the data associated with each visit.

The size of the number pool therefore needs to be calculated based on traffic volume and the number of simultaneous sessions. If there are too few numbers, the same number may be assigned to several active visitors, reducing attribution accuracy.

How Call Tracking Identifies the Source of a Call

When a user visits a website, the system records the available session parameters, including the traffic source, UTM tags, campaign, and other advertising identifiers. The visitor is shown a number from the pool, and once a call is made, the system matches it with the corresponding session data.

At the same time, clicking a phone number and actually having a phone conversation are two different events. A person may tap the Call button and cancel the call a second later. For this reason, analytics should define separately what qualifies as a target call, for example, based on call duration.

The next level is CRM integration. If the outcome of the conversation is also recorded in the system, the marketer sees more than an abstract “50 calls from Google Ads.” They can evaluate the quality of those calls: 50 calls → 31 consultations → 12 orders. Campaigns can then be compared based on what happens after the initial contact.

How Businesses Pay for “Blind” Leads Without Call Tracking

Suppose a company spends $3,000 per month across three advertising channels. During the month, web analytics records 150 form submissions, while another 100 potential customers call the company. This means that 40% of all inquiries come by phone, but their source remains unknown.

As a result, the marketer may draw the wrong conclusion about channel performance. Campaign A generates many inexpensive clicks and form submissions, so it receives most of the budget. Campaign B has a higher cost per click and fewer form submissions, but customers who come through it are more likely to call and make a purchase. Without call attribution, the second campaign appears less effective than it actually is.

“Most often, clients come to us after they notice a gap between their advertising spend and the number of actual sales. Once we set up call tracking and match calls with advertising sources, the picture changes: the channel that appeared to have the lowest cost per click often turns out to be the one that generates no calls at all.”

— Max Yablonsky, CMO at DID Global

Once call tracking is implemented, phone leads can be included in performance calculations, allowing campaigns to be compared by cost per inquiry, qualified lead, or sale. For real estate, healthcare, auto services, legal services, and e-commerce businesses that provide consultations, the difference can be significant because phone calls remain an important sales channel.

How to Set Up Call Tracking with DID Global

The first step is to determine the level of detail required. If the goal is to compare Google Ads, business directories, and offline advertising, a separate number can be assigned to each source. If attribution is needed at the campaign, ad, or session level, a pool of numbers and dynamic number insertion on the website will be required.

DID Global provides virtual phone numbers in 180 countries, allowing businesses to build a call tracking number pool for specific markets. For example, if a company runs advertising campaigns in the United States, the United Kingdom, and Germany at the same time, it can use local numbers for each market and route incoming calls to the appropriate sales team.

Once the numbers are connected, call tracking data should be integrated with the CRM and advertising analytics. This gives the company a complete view of the customer journey, from advertising spend to call outcome, and helps identify campaigns that consume budget but generate few or no genuine inquiries.

To set up the number infrastructure for call tracking, businesses can contact DID Global. A manager can help select the appropriate numbers and determine how many are needed based on the target countries, traffic sources, and planned use case. The numbers can then be integrated into the company’s call tracking system and call routing setup.