This is the 3485th most frequent Turkish word.
netleşti
"Became clear" or "was clarified."
In this sentence, 'netleşti' refers to the process of becoming clear or well-defined with regard to the mentioned 'plans'.
Planlar sonunda netleşti.
The plans have finally become clear.
Here, 'netleşti' indicates that the ideas shared between participants have reached a mutual understanding and clarity.
Sanırım fikirlerimiz netleşti.
I think our ideas have become clear.
In this case, 'netleşti' means that the exam dates have been finalized or decided upon concretely.