Why is publishing results important in science?

So other scientists and people can see said results and retest the same project to see if the results are valid.

*This enables the science and medicine community to evaluate and see the findings. The results are used to repeat the experiment and verify the existing results.

Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.