Questions & Answers about Matboden selger suppe.
Because Norwegian usually writes compound nouns as a single word. Here, mat + bod become matbod, meaning something like food stall or food booth. Then the definite ending is added, giving matboden.
A useful rule: in Norwegian, the last part of the compound is the main noun.
It is capitalized only because it is the first word of the sentence.
In Norwegian, common nouns are normally not capitalized in the middle of a sentence. So if it came later, you would usually write matboden, not Matboden.