You have decided to outsource your link building needs, but what needs attention is how you select a service. Hiring the best guest posting service is important, because it determines the entire approach and process of acquiring links. You need a service that can offer quality contents for authority sites, because eventually, quantity doesn’t make a huge difference, unless the quality of posts is maintained.
It is a good idea to check the range of work they have done so far, for which you can ask for samples and references. If the service has specific experience in your industry, it is always an added advantage.