Knowledge comes not only with education, but experience. Ask how long a company has been in business and check social media sites, search engines and places like their reviews for customer feedback.
Also, ask your friends and neighbors who they have used in the past and their experiences with the company. One or two bad reviews do not necessarily mean you shouldn’t use a company, but many poor reviews should raise a red flag. You can also ask the company for references if the information is not available online.
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