Typosquatting is the act of purchasing a domain close to an existing one (i.e. Ebbay.com in lieu of Ebay.com) and linking it to a page of advertisements and links. The people that perform this act hope to lure folks that frequently make typos to their site and earn revenue from the aforementioned advertisements and links. These type of pages can contain malicious software, however, there usually just attempts to earn revenue.
If you’re ever presented with a page full of useless links instead of what you were looking for when trying to visit a new site, be sure to double check your address.
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If registration of a domain name has expired, some people will buy them up. I’ve clicked on expired links just to end up at one of those “typosquatting” sites, complete with links.
A good choice is to bookmark your most popular sites or try typing the name.com in.