Before you look at a web page, remember that on the Internet nobody knows you're a dog. Anyone can write anything on the Internet and it doesn't have to be true. There are a couple of tools for assessing the quality of websites, one of which is the CRAAP test: a list of criteria that you can use to assess the credibility of a source. If you're doing research on the Internet, consider the following:
Currency: when was the information posted, has it been revised or updated, does it reflect current knowledge, do the links work?
Relevance: who is the page aimed at, is the information at an appropriate level, how does it compare to other sources on the same topic, would you be happy to use this a source if you were writing an assignment/dissertation?
Authority: who wrote the page, do they have any qualifications & and are they relevant to the topic, is there contact information, what is the top level domain e.g .com (companies) .gov (government), .org (non-profit organization), .edu/.ac (educational )?
Accuracy, what the source of the information, is it evidence-based, what kind of language is used, what is the tone of the page, is it free from grammatical or spelling errors, can you verify any of the information independently?
Purpose: why does the page exist, is the author trying to inform, persuade, entertain or sell you something, are the intentions clear, is it objective, Are there political, cultural or other biases?