Here are a few ways to rewrite your title, depending on the level of formality you require:
Most Direct & Formal:
- “The Impact of Misinformation on Facebook and Instagram on User Belief Systems”
Academic/Research-Oriented:
- “An Analysis of the Influence of Misinformation on Facebook and Instagram on Public Opinion”
Concise/Professional:
- “Assessing the Influence of Social Media Misinformation on Individual Beliefs”
The best choice for a formal paper or article would be:
“The Impact of Misinformation on Facebook and Instagram on User Belief Systems”