I am working on a website that has thousand of pages. One of my main concern is that the previous webmasters used the same text blocks on various pages. Thus, even though most of the pages are different, the because of that useless text the content will me 50% duplicate to all the other pages in that category.
I will be noindex-ing useless or thin pages, create unique titles and meta descriptions which will help. But, as I have said I think that several blocks of the same text was used on multiple pages. Is there a way to check the website for this? Perhaps a tool or a crawler that will notify me in case it finds duplicate content on the website's pages? I cannot manually visit every page because I am talking about thousand of pages.
Please note that I am talking about CONTENT and not just titles and meta descriptions. I am talking about the same block of text/description/story that has been put on 100 different pages.
Any idea what to do in such a case?