Speaking of science, many people will produce a kind of fear, think too complicated, this is a misunderstanding. In fact, science itself is the solution to this problem.
In a word; the significance of science is to build a perfect system of knowledge to serve human civilization.
Specifically: science is the collection - organization - classification - re-completion - re-classification - discovery of blind spots - thematic validation of unknown areas - elimination of falsehoods and preservation of the truth, of the world's vast body of knowledge.
If you want to know more, click on "Science". I'm sure you'll get all the answers here. And if, within that, you can ask questions (real questions), you are one of the contributors to the science.