Souls incarnate on this Earth, in Creation, and as they go through Life through many lifetimes, they create karma, experience karma and balance karma. There are different kinds of karma. The karma molds the experiences they have and what the soul in physical form does.
Souls in physical bodies create karma all the time. Even just by being, such as when people are breathing, and standing still, as well as by thinking and doing things.
Consider humans, not only can they create, and balance and go through karma individually, they can do this as a family, for instance eating a meal, or going someplace.
People can create and go through karma as a group, for instance a group of fans watching sports match or a music concert, a group of people demonstrating, working for an organisation, and investing in a certain stock.
Then there is regional karma where something is experienced or done by an entire population of a region. One example would be New York and the recent pandemic.
There is national level karma that is created by a nation and experienced by a nation. For instance, one nation goes to war against another nation, a nation experiences having a political leader, or having sanctions applied against them, or they all (or most) have a day off work in a nationwide holiday.
There is global karma where the entire planet creates karma, such as by creating pollution, and experiences karma as a planet, such as experiencing a global pandemic, or rising sea levels.
So there is individual, family, group, regional, national and global karma. There is even solar system karma. For instance, the solar system may experience cosmic rays from a quasar, or there is an increase in solar activity. There is even galactic karma that applies to a whole galaxy. There are some galaxies that are crashing into each other, for example.
For each of the above there is positive karma, which is experienced as something happy and pleasant. There is negative karma which tends to be experienced as something unpleasant or horrible, but when it is gone into in detail, it always turns out to be something that is balancing out another experience, or balancing out negative energy from a previous life or lives.
Then there is opportunistic karma that can go either positively or negatively, depending on choices perceived, positive or negative attitude, and decisions made.
We are not only physical beings, but we have an astral body which relates to emotions, and we have a mental body, which relates to thoughts. So through what we do, feel and think, we have physical level karma, astral level karma and mental level karma. And these are positive, negative and opportunistic.
In our lives, we balance out karma from the past, sometimes from distant past lives, and we usually create karma, which gets carried over to be balanced in some future lifetime. As mentioned in another article, the karma gives us something to experience and learn from at soul level, and so develop in consciousness over many lifetimes.
For more on karma, try these:
About karma and mental health
About karma and gender and sexuality
About karma and relationships
About how karma and the law of Opposites helps you grow
Your past lives, karma and spirituality