When choosing an SEO agency in Markham, it's important to consider several factors to ensure you're making the best choice for your business. First, look for a reputable agency with a proven track record of success in improving search engine rankings for businesses in your industry. Check their client testimonials, case studies, and online reviews to get a sense of their capabilities and customer satisfaction. Second, ensure that the agency offers comprehensive SEO services that align with your business goals and target audience. This should include local SEO, keyword research, on-page optimization, and link building. Third, ask about their reporting and communication practices to ensure you're kept up-to-date on your campaign's progress and any necessary adjustments. By taking these factors into account, you can find the best Markham SEO agency to help your business achieve success online.