Ramming was a naval tactic in which starships would be used as physical weapons and collided with enemy starships. It was used during the Clone Wars, the Galactic Civil War, and the First Order/Resistance War.
The ramming tactic consisted into using the mass of a starship hull as a weapon and thrust it at maximum speed into another ship, so that it would damage or destroy either critical systems or the whole target. It was mostly regarded as a last chance action, as the end result would also damage, if not destroy the ship who engaged in such tactic. Its effects would vary, depending of the sizes of both ships, and where they made contact.
The usage of the ramming tactic knows some variety. It could be prepared in advance (by adding explosive to a ship, for example), or be the result of a snap decision. Either way, in certain case, it could be classified as a suicidal attack, as pilots were well aware that engaging in such maneuver could damage or destroy their spacecraft.