See moss, remove moss
Moss grows on shaded areas of the lawn, especially as the weather gets cooler. Moss thrives in dark and damp conditions so often outperforms the grass plant in shaded areas.
As moss can kill your lawn, it’s important that you remove it immediately and keep an eye on it throughout the autumn and winter months.
There are many ways in which you can support your lawn when it gets limited sunlight, however, if you are finding it hard to keep your lawn healthy and it’s getting almost no sunlight, then it might be a good idea to think about repurposing that part of your garden, such as laying some patio down or adding some furniture in a specific area.
source: express.co.uk