Merge Conflict : How to leverage the Bubble functionality in Resolve Conflict code window

Summary:

There is a bubble functionality which seems to be useful for resolving conflicts by selecting the most relevant version of code once a Merge Conflict occurs.
However, we have noticed that the selection made through bubble is not always resolving the conflict accurately and there are redundant/arbitrary lines of code in the resolved version as well.
Wanted to understand the best practice for the conflict resolution for Merge Conflicts.

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