Modifiers are important elements in the Blender Software.
The 'Modifiers' icon can be found in the toolbar at the left of the screen, taking the form of a wrench.
Modifiers are used for temporary editing of meshes, and contains many important features to better mould your object, such as bend, twist, shrinkwrap and subdivide surfaces.
Not that when not applied, the shape of the original mesh is present in Edit mode. Modifiers can be permanently applied by clicking 'apply modifier'.