What is the meaning of Maarga Dharshan? In what context is it used and who is the one eligible to provide this Dharshan?
To word Darshana (दर्शन) has the following meanings
seeing,looking perceived, become visible or manifested
The word Marga (मार्ग) means
a way, road, path
and is derived from the verb root Marg (मार्ग्)
to seek, seek for
Hence, Marga Darshana would mean to demonstrate a path for the seeker. It is used in the context of spiritual guidance, or guidance for any other way.
In my opinion, a person who knows already knows the way or has crossed over the (spiritual) path can provide Marga Darshana. In this context, a Guru or an enlightened Master.
In a limited context, a personal with knowledge of a specific aspect can provide guidance for that aspect only.
Reference used: The Practical Sanskrit-English Dictionary by Vaman Shivaram Apte.