Wildcard

Wildcard

A wildcard is a generic character used to represent an unknown or variable sequence of characters in a computer rule. It allows you to define a single rule capable of covering many cases without having to list them one by one.

Within the marketing technology ecosystem, this mechanism is used in certain search engines and numerous technical configurations related to targeting, tracking, and managing sending infrastructure. Martech platforms, in particular, use wildcards to manage domains, filter data, and structure certain automation rules.

What is a wildcard?

Most often, a wildcard relies on two generic characters: the asterisk (*) et the question mark (?)The asterisk can replace any string of characters, while the question mark generally represents a single unknown character. These symbols make it possible to define generic rules that can cover numerous variations without having to list them individually. This logic proves particularly useful in martech environments, where platforms handle a large number of domains, URLs, data segments, or marketing events.

Wildcards and marketing domain management

One of the most frequent uses concerns the management of domains and subdomains related to marketing activities. Emailing, marketing automation, or tracking platforms often use several subdomains to isolate different functions: sending emails, redirecting links, hosting landing pages, or collecting data.

In this context, a configuration of type *.marque.com This allows for the automatic inclusion of all associated subdomains. This approach simplifies the management of security certificates, DNS configurations, and authentication rules used to improve email deliverability.

Use in data segmentation

Wildcards also play a role in marketing data segmentation and filtering mechanisms. In a segmentation engine, a rule can search for contacts whose email address matches a particular pattern, such as *@entreprise.comThis syntax allows all users belonging to the same organization to be identified without having to enter each address individually.

This allows marketing teams to create dynamic segments more quickly and leverage customer data more effectively.

Analysis of marketing interactions and events

Another area of application concerns the analysis of marketing interactions and events. In some customer data or marketing analytics platforms, wildcards are used to group several events or URLs sharing a similar structure.

For example, a collection rule can capture all product pages whose URL follows a common pattern, such as produit-*This type of configuration facilitates the aggregation of engagement data and simplifies the creation of marketing reports.

Wildcards and technical configuration of the platforms

Finally, wildcards appear in the configuration of many technical rules related to security and tracking. They can be used to define authorized domains, configure redirects, or structure certain email authentication policies. For example, in a certificate or security rule configuration, the expression *.brand.com automatically authorizes all subdomains of the same domain, such as email.brand.com, track.brand.com, or promo.brand.com.

In a complex martech environment, where several tools interact with each other, this ability to generalize a rule makes it possible to reduce the complexity of settings and improve the maintainability of marketing infrastructures.

Conclusion

The wildcard is a simple yet powerful element of the technical architecture of martech platforms. By allowing multiple values to be represented using a single wildcard symbol, it facilitates domain management, data segmentation, interaction analysis, and the configuration of marketing infrastructures. Its use helps make systems more flexible and better suited to the increasing complexity of digital marketing environments.