What is w3 validation in SEO?

Related questions

1. What is the purpose of using the w3c validator?
2. What are the advantages of validation?
3. Is w3 validation important?
4. Why is w3c important?
5. What makes a premise false?
6. What does validator mean?
7. What does w3c validator do?
8. Does w3c Validation matter?
9. What is Process Validation and its types?
10. What is a w3?

Tags

1. #markup
2. #website
3. #accordance
4. #proper
5. #consortium
6. #standards
7. #those
8. #making
9. #validation
10. #pages
11. #works
12. #company
13. #built
14. #stands
15. #unfamiliar
16. #check
17. #develops