Scholarly/academic/peer-reviewed sources are sources written by experts and are reviewed by experts in the field before the article is published.
You may consider scholars with subject expertise have authority in the area of your research topic and thus produce only good sources. However, like all types of sources and authorities, scholarly sources vary a lot by date, scope, method, and etc, making only some of them appropriate to cite in your research. Scholarly sources may have totally valid evidence but not so relevant to your research.
Finding a good scholarly source to use can sometimes be a messy process, but below are some questions you can ask yourself in order to determine if the academic article is worth using in your research.
More information about factors to consider when evaluating scholarly articles
In this video you will learn: How to determine if a website is a good source for your assignment.
The following is a list of the most popular domain extensions, which can help in determining the authority of a website. However, domain extensions alone cannot determine if a web source is quality or if it's right for your research.
.gov - Government
.edu - Educational institution
.com - Commercial
.org - Organization, usually non-profit
.net - Network, usually personal webpages