A 10-Digit Long Code (10DLC) is a standard phone number comprising 10 digits, similar to traditional phone numbers used for voice calls and SMS. However, 10DLC is designated specifically for SMS communications and is widely employed for Application-to-Person (A2P) messaging. 

Businesses utilize 10DLC to send SMS messages to their customers for various purposes such as appointment reminders, notifications, marketing updates, and transactional alerts. Unlike short codes, which are typically five or six digits in length and are often used for high-volume messaging, 10DLC provides a more recognizable and familiar communication channel. 

The use of 10DLC enhances customer engagement as messages appear to come from a standard local phone number. This familiarity helps in building trust and increasing response rates. Moreover, 10DLC offers better deliverability compared to short codes, making it an efficient option for businesses to reach their audience effectively. 

It's important to note that there are regulations and guidelines associated with using 10DLC to ensure proper and compliant usage. These guidelines vary by country and may include registration requirements, message throughput limits, and adherence to messaging best practices. 

Understanding 10-Digit Long Code (10DLC) is essential for businesses seeking to optimize their SMS communication strategies. It provides a valuable channel for reaching customers in a personalized and recognizable manner, enhancing overall engagement and interaction.