SEO is an on going process. Over time, your rankings will start to dip if you’re not building links and adding fresh content to your website. In addition to this, it’s likely that your competitors will be enhancing their SEO in order to overtake you, if they are not already doing so. And finally Search engines like Google are always updating their algorithms, keeping on top of this for all your keywords can be time consuming, especially when you have other business worries.