Many web pages provide good, scholarly, true information. Many do not. There's a lot of garbage on the web, perhaps even more than in regular print media. Some pages provide just the author's opinion, with no facts to back it up.
Some pages are just lies, or stuff the author made up.
Sometimes web sites are meant to be a joke. Some are full of hearsay, rumor, or unsubstantiated information. Some are generally truthful, but biased, providing just one side of the story. Articles in scholarly journals are researched and investigated before they are published to ensure accuracy. Some of these print journals , and their indexes are then transferred to the web.