Google’s webmaster tools provide you with the power to de-index bloat and dis-qualify URLs. Bloat and spamming are a pain for SEO, since they can negatively impact your search engine rankings. In addition, your clients may see a big difference in the user experience because they have to scroll and navigate through your website to get to the information they want. De- indexing and demotion are a process where you remove the useless content from your site. The trick is that you also have to re-index the new sites you add, so that Google can find them.
The thing about URLs is that they are placed in the HTML code of the page rather than within the actual content of the page. This means that when you Google an individual URL, you don’t know what keywords or phrases might be in it. Google indexes the HTML page as if it were an entire page of text. So when someone is looking up something on Google and there are multiple pages with the same information, they will get different search results for each URL. The process of de-indexing and demotion, then, is to redirect the URLs to their correct pages. That means that you have to update your sites with new URL placements in order to be effective. The problem is that if you do this every time you make a change to your sites, you can’t keep up with all the URL changes that you need to do.
The most important part of de-indexing and demotion is making sure that you always have a new URL location. Each URL is just like any other page on your site, except for one important detail. You want to make sure that you update your sites with new URLs as much as possible, so that Google can find them. While you can certainly keep track of the URLs manually, it’s usually easier and faster to use tools to do this for you.