Yep, that's not just any number, literally from 41 to 43% of my pages get de-indexed from Google. Has anyone experienced this in the past? Specs of the site: - No blackhat used - Have sitemap xml - Web-site passed xhtml validation - Web-site is 4 months old
Your question is too general. Please, specify the following: What is the total number of pages on your website - 20, 50, 100, 1000? What is your website content? Is it unique? What do you know about backlinks to your website pages?
Its happened to me before thought not so many pages. Every time google makes an adjustment to the algorithm it can happen. Or it could also be caused by over aggressive link building