Here is an example of an article on from a reputable source that can lead me to potentially useful primary sources:
Filter bubbles cause us to browse the internet in a way that aligns with our beliefs and biases and narrows our point of view. Search engines and websites collect data on your habits so that they can show you information that you agree with and ads that will interest you.
So, how can we burst the bubble and see a wider variety of information?
Find a claim that you're not sure about? Fact-checking sites can help. Here are a few that are trustworthy: