Answer:
It's important to know who the author is and how he/she got the information published on the website.
If the information on a website is published by anonymous authors, then it's unreliable, because you have no idea who the author is or which qualifications he/she has.
If in the website author’s information and qualifications are always listed, then it's reliable.
If in the website sources are consistently listed at the end of the articles, then it could be reliable or unreliable depending on the cited sources.