To call something consequential is to say that it's significant or important, with special attention to the consequences, or effects and outcomes, it brings. The primary meaning of consequential is "following as an effect, result, or outcome." The term ultimately comes from the Latin verb sequī meaning "to follow," which is also the source of the word sequence. A consequential decision is one that will significantly shape what follows. An event that is politically consequential is one that might alter the course of politics in some significant way, and something that proves consequential is revealed over time to have been an important or determining factor in the course of events.
Help comes in many different forms. To bolster something is "to add to, support, or uphold" that thing. The verb comes from the noun bolster, a cushion or pillow. The idea of cushioning, propping up, or giving a boost is central to the verb. However, while this noun bolster is most likely to prop up a person, the verb bolster is more commonly found in discussion of concepts and ideas. For example, you might bolster a case or an argument, or bolster a friend's confidence. Similarly, internet companies will seek to bolster their traffic, and government agencies strive to bolster the economy.
The verb create, at its most general, means to bring something into being. To devise something is to plan it or think it up. The main action of devise occurs in the mind. An economist may devise a plan or a strategy, for instance, with the goal of creating jobs or wealth. In some older uses, devise carried nefarious and deceptive undertones, as in "The conspirators devised the downfall of the ruler." Nowadays, devise is more neutral, though it may still have a plot or two up its sleeve.