here are the five best SEO choice in Sri LankaSearch Engine Optimization (SEO)
Best SEO companies are proving their ability to rank in their own keywords, like SEO company Srilanka, seo services Sri Lanka, seo company in Colombo, seo services Kandy, Site ranker Sri Lanka. If they are able to rank their website in above keywords you can consider them for assigning to your SEO project.
Go to SEO company website portfolio page and check how they achieved for their customers. Professional companies shows at least few SEO works done by them along with the keyword ranking.
Check companies social media accounts like Facebook / LinkedIn profiles/ Google business listing check the reviews and followers. Choose rating wise recommend 4+.
You can easily find the email id or contact number from website. Ask him about the challenges, strategies.
Confirm the payment policy, refund policy, guarantees, time frame, contract terms and conditions etc ask by email for your record.