There was a lot of technology that was introduced during WWI. A trend began towards industrialism and the application of mass production methods to produce weapons and to increase the technology of warfare. Many tactics were also used and were very influential on the war.
The Trench Warfare was when men would hide in deep trenches so the bullets couldn't hit them, they would prop up their guns and shoot whenever it was safe. Because attacking an entrenched enemy was so difficult, tunneling underneath enemy lines became one of the major efforts during the war. Once enemy positions were undermined, huge amounts of explosives would be planted and detonated as part of the preparation for an overland charge.
Of all the types of weapons in existence in 1914, artillery underwent the most revolutionary and scientific advances. At the beginning of the war, artillery was often sited in the front line to fire over open sights at enemy infantry. During the war though many improvements were made, such as the first anti-aircraft guns, flash spotting and sound ranging were invented, for the location and eventual destruction of enemy batteries, the creeping barrage, the wire-cutting Number 106 Fuze was developed, specifically designed to explode on contact with barbed wire, or the ground before the shell buried itself in mud, and equally effective as an anti-personnel weapon.