Tip 01: How do get traffic your own websites?
You can ask how do you get more traffic you own websites. They will can say, we do PPC, social sharing and good conversion optimization. If you can see proven results you can hire the company.
Tip 02: Check case studies and testimonials
If you can see big case studies and testimonials, you can trust company brands and their customers.
Tip 03: Use strategies
Check whether what tools and methodologies they are using for SEO. SEO company should explain how to implement their strategies and tactics.
Tip 04: Working Time
You need to confirm who are working with my account. What is working hour
Tip 05: Regular communication
You can ask whether they provide reports, weekly call and email communication. If they cannot provide such information, beware to select as a SEO company.
Tip 07: References