Biochar can improve soil fertility and help fight climate change. It affects soil organisms like microbes and worms, but we don't fully understand how. Biochar can increase microbial biomass and change their communities, which can impact plant growth. The physical properties of biochar, like its structure and minerals, play a big role in how it affects soil life. Biochar can help soil organisms thrive by absorbing harmful substances and providing resources. It doesn't seem to harm plant roots, and any decrease in fungi is likely due to increased nutrients. Fresh biochar can release different organic molecules that can either boost or reduce soil life.