You're looking for the most useful sources for your topic, not the first ones you find. You'll need to do thorough research, which takes time.
Currency
When was it published?
Relevance
Is it an appropriate level?
Does the information relate to your topic?
Authority
Who is the creator?
What are their qualifications on the topic?
Accuracy
Has it been reviewed or vetted?
Is it supported by evidence?
Purpose
What is the purpose of it? Inform? Critique?
Are there biases in it?
Authority
Bias
Content
Date