Folkvang, or Folkvangr, is believed to mean something along the lines of 'the field or meadow of the warrior people'.
Here, Freya holds sway and in her hall Sessrumner (which roughly translates to 'many-seated') the revered goddess of war receives half of all the fallen warriors as her guests.
Freya and Odin went halves
The above is at least one interpretation that we can derive from the written sources available to us.
However, the interpretation is not undisputed. From Grímnismál in the Poetic Edda, we learn that:
'Folkvang is the ninth,
and Freya rules there
deciding how seats in the hall shall be apportioned;
half of the fallen she has chosen,
the other half Odin has.'
It has been suggested that this passage refers to the act of choosing rather than implying that half of the fallen end up in Freya's hall.
Today, many aspects of Viking-age culture and mythology remain shrouded in obscurity, lost to the mists of time. In order to gain an understanding of what Viking-era mythology and worldview were like for those who lived during that time, we will sometimes just have to take our best guess.
It is unlikely that we will ever gain a complete understanding of their perspectives and beliefs. But isn't it fascinating to dwell on what it was like living in the Viking Age?