Back to Glossary
BackendBeginner Friendly

What is Validation?

Checking that data meets requirements before processing it

Why It Matters

Validation prevents errors and security issues by rejecting bad data early

Real-World Example

Checking that an email address contains an @ symbol before saving it

“Understanding terms like Validation matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”

Callum Holt, Founder, 13Labs

Learn More at buildDay Melbourne

Want to understand these concepts hands-on? Join our one-day workshop and build a real web application from scratch.

Join buildDayExplore More Terms

Related Terms

Glossary

Error Handling

Code that gracefully manages problems instead of crashing or showing confusing messages

Glossary

Schema

A blueprint that defines the structure of your data, including fields and their types

Glossary

Sanitisation

Cleaning user input to remove potentially harmful content

Glossary

Backend

The behind-the-scenes part of an application that handles data, logic, and communication with databases

Glossary

Cron Job

A scheduled task that runs automatically at specific times or intervals

Glossary

Background Job

A task that runs behind the scenes without making users wait for it to complete