I have a website and i regularly check the google webmaster tool for that. Two days before when i checked it was shoeing more than 100 links but today only 3 from a single site . what is the problem, why all my links dropped. please explain ?
Did you originally leave a comment with a link back to your site on that site? What happens sometimes is that your comment will go on the first page and give you a sitewide backlink which GWT will report however many links. Then when that front page comment listing goes away, so does all those links and your left with the page you left the comment on. Sometimes Ive noticed with my GWT is that they'll go away for a day or a week then GWT will list them again. So it could be many factors why you noticed what you noticed. Hope that helps!