In simple terms, a quality backlink is where your own website domain name appears on another independent website that is not only relevant to your industry, but also gets a large number of visitors.
Many years ago it was not so important how many backlinks you had or which websites they were positioned on. You could even buy a bulk load of backlinks without any idea of which websites they be appearing on. Nowadays, it is more about the quality of the backlinks as opposed to how many but the more quality links you have, the better.
Although this is an essential part of good optimisation, it is not a service that we provide as it is an ongoing task and the amount of time it would take would amount to a high cost for something that every business should be able to spend 10 minutes a week updating.
A good start to building quality backlinks is to search for business directories that include a category suited to your own business. Many of the web directories offer a free listing, others may charge or ask for a reciprocal link on your website. Get involved with using social media and join relevant online blogs where you can link back to your website.