How often do they report and what is the format of these reports? All professional customers should provide regular updates with any professional SEO agencies Singapore written report. What kind of skills and qualifications do they have?
For any recognizable big names, look at your existing client lists and see if they have one or not, some companies use quality standards like ISO 9 001, which is a nice sign. What else do they do? Many of these companies are mainly Web Designers who offer outsourced SEO services to resellers to promote their profits. This is a good quality service that you need to select for your business.