You probably visit at least a few sites that are relevant to your business on a regular basis, so why not join the conversation? Commenting doesn’t necessarily provide an immediate boost to referral traffic right away, but making a name for yourself by providing insightful, thought-provoking comments on industry blogs and sites is a great way to get your name out there – which can subsequently result in driving more traffic to your own site. Just remember that, as with guest posting, quality and relevance are key – you should be engaging with other people in your niche, not dropping spam links on unrelated websites.
Not all web traffic is welcomed. Some companies offer advertising schemes that, in return for increased web traffic (visitors), pay for screen space on the site. There is also "fake traffic", which is bot traffic generated by a third party. This type of traffic can damage a website's reputation, its visibility on Google, and overall domain authority.