The Wikipedia snippet below is not backed by a reliable source. Can you find one?
Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!
In page Advertising:
"Online advertising began with unsolicited bulk e-mail advertising known as "e-mail spam". Spam has been a problem for e-mail users since 1978.[4] As new online communication channels became available, advertising followed. The first banner ad appeared on the World Wide Web in 1994.[5] Prices of Web-based advertising space are dependent on the "relevance" of the surrounding web content and the traffic that the website receives.[citation needed]
You can customize Citation Hunt by providing a list of articles. This gives you a link that you can share with others so they browse Citation Hunt limited to the articles you provided.
How would you like to create a custom Citation Hunt?
Use the search box below to find and add articles to your custom Citation Hunt. You can remove an article by clicking it in the preview below.
Please enter Wikipedia article titles to import, one per line, in the area below:
PetScan is a tool for querying Wikipedia and defining lists of articles. PetScan assigns IDs to queries so their results can be imported into other tools.
Please create your query in PetScan and paste its ID below:
Please wait, your custom Citation Hunt is being computed. This may take a few minutes…
You can press Back or close this dialog to cancel.
Your custom Citation Hunt has been created!
You can copy and share the link above to allow other people to use it, or start browsing it now!
Sorry, your custom Citation Hunt failed to be created or came up empty!
Please try again and keep the following tips in mind: