Retargeting can also target users that have shown online interest in specific products or services through searching for these things. An example of this is when a person searches online to buy an item and then goes on their social media account or to an online newspaper. There is a good chance that there will be specialized ads on the consecutive websites that are targeting that user to buy the same product or similar types of products. Retargeting depends on the use of cookies and different methods are available to achieve this including site, search, email or link retargeting. Retargeting campaigns are charged through different models including the cost per mille (CPM), cost per click (CPC), cost per action (CPA), Cost per impression (CPI) or pay per click (PPC).