On the Review Forum, there are 3 ways to get informed about what is currently happening in the review process and what actions are still pending: the Progress bar, the 'Action Required' Field and the History tab.
The Progress Bar will indicate how advanced the article is in its review process. The stages of review are Submission, Independent Review, Interactive Review, Review Finalized and Final Decision.
The 'Action Required' Field will summarize what action you are supposed to take in the forum at this point given your role in the review process and the actions that already took place.
In the History Tab you can find information about all major actions during the review with timestamps. Please note that what is actually visible may vary depending on your role (author, reviewer, editor, etc.)