Yes, it is important that you check the information in your visa is correct.

You may have been granted a visa for fewer days or fewer entries than you have applied for. If you believe this is due to an error or a misunderstanding, you must contact the embassy. If you disagree with the decision, you can appeal to the embassy.
Remarks are codes with further information about your visa, listed under the area marked (8) on the picture above. The coded remarks on the visa have the following meaning:
NO 1: The visa is issued under ‘Approved Destination Status’ for China.
NO 2: Exempted from the travel insurance requirement.
NO 3: The visa is also valid for the Faroe Islands.
NO 4: The visa is also valid for Greenland.
NO 5: The visa is also valid for the Faroe Islands and Greenland.
NO 6: The applicant has exceptionally been issued a visa even if the passport is not valid 3 months after the last day of validity of the visa, in accordance with Norwegian Immigration Regulation § 3-9 second paragraph.