The houses indicate where activity is happening.
"Oikos" is Greek for "eco", translating to family, dwelling, lineage, or house.
Houses mark segments of space and there are a variety of House projections (Equal, Whole, etc.) that divide in different ways.
All house projections have their merit, but my favorite to use is Campanus, for this projection takes into account complexities.
The houses are a process of unfoldment. As with our own lives, we often imprison ourselves in the mindset of division and isolation. Each house deposits their own kernels to be carried, grown upon, transformed, and decayed into the following houses.
The natal chart is a fluid, changing cycle of interdependence. The houses are a story of emergence and development as a human being. House by house, we are given insight into our innate predisposition to experiences of life and how to meet life in a given area.
In the natal chart, 4 main angles (or cusps of houses) signify central and dynamic forces of energy, and these are
the Ascendant (ASC; House 1 cusp),
the Imum Coeli (IC; House 4 cusp),
the Descendent (DSC; House 7 cusp),
and the MidHeaven (MC; House 10 cusp).
These are the 4 natural placements of cardinal or generative energy, uniquely anchored into our own charts.
These 4 directions can be the geographical cardinal points that orient us to our own sacred space.
If you do not have a planet in a certain house, this in NO way means you are not going to experience this house!!
Each and every house in your chart has their own personality and tendencies according to the Zodiac Sign connected to it. With a Sagittarius House 4, for example, it is still poignant to reflect on Sagittarian qualities of home and rootedness even if this house does not contain planets.