Website tracking

Website tracking refers to the act of archiving existing websites and tracking changes to the website over time. Many applications exist for website tracking which can be applied to many different purposes.
Website monitoring.
Website monitoring allows interested parties to track the health of a website or web application. A software program can periodically check to see if a website is down, if broken links exist or if errors have occurred on specific pages. For example, a web developer who hosts and maintains a website for a customer may want to be notified instantly if the site goes down or if a web applications returns an error.
Monitoring the web is a critical component for marketing, sales and product support strategies. Over the past decade transactions on the web have significantly multiplied the use of dynamic web page, secure web sites and integrated search capabilities which requires tracking of user behavior on web sites.
Website change detection.
Website change detection allows interested parties to be alerted when a website has changed. A web crawler can periodically scan a website to see if any changes have occurred since its last visit. Reasons to track website changes include:
Web press clippings.
This is a parallel application to the offline business of press clippings. For web press clippings, a crawler needs to scour the Internet to find terms that match keywords the clipping service is looking for. So for instance, the Vice President of the United States may have staff looking at web press clippings to see what is being said about the Vice President on any given day. To do this, a web press clipping service (aka Media monitoring service) needs to monitor mainstream websites as well as blogs.
Website archiving.
This type of service archives a website so that changes to the website over time can be seen. Unless archived, older versions of a website cannot be viewed and may be lost permanently. Fortunately there is at least one web service (see Internet Archive) that tracks changes to most websites for free. Past information about a company can therefore be gleaned from this type of service, which can be very useful in some circumstances.