Hi @hybhurruth,
It might be helpful for you to review the editorial workflow section of Learning OJS: https://docs.pkp.sfu.ca/learning-ojs/3.3/en/editorial-workflow - it goes into more detail than can be explained here about. Please note that this is version 3.3 documentation - you may want to check the correct version of the documentation as you determine your version number (see below)
Please see this post here: How do I determine my PKP software's version?
-Roger
PKP Team