Pruning your tomato plants (Solanum lycopersicum) generally improves the health of the plants and the quality of the fruit they produce, but not every type of tomato plant benefits from pruning. Determinate plants, for example, don’t need much pruning to thrive. Combining pruning with stakes or tomato cages encourages your tomato plants to grow in an upright form that reduces the risk of disease and increases the longevity of the fruit they produce.
This one is pretty straightforward. Here is how to prune a tomato plant. Basic, yet useful info!