Verily, a WordPress plugin is as a small craftman’s tool added unto a greater house. The WordPress site is the hall, already built with timber and stone; the plugin is a clever device brought in to grant new powers. One plugin may fashion a contact form, another may guard against rogues, another may show wares for sale, and another may make pages swifter. It need not rebuild the whole dwelling, but joins thereto and changes its working. Thus doth the site gain fresh skill, as a blacksmith adding a fine new hinge unto an ancient door.