Passage: Many television advertisements feature songs or melodies ("jingles") or slogans designed to be striking and memorable, which may remain in the minds of television viewers long after the span of the advertising campaign. Some of these ad jingles or catch-phrases may take on lives of their own, spawning gags that appear in films, television shows, magazines, comics, or literature. These long-lasting advertising elements may be said to have taken a place in the pop culture history of the demographic to whom they appeared. An example is the enduring phrase, "Winston tastes good like a cigarette should", from the eighteen-year advertising campaign for Winston cigarettes from the 1950s to the 1970s. Variations of this dialogue and direct references to it appeared as long as two decades after the advertising campaign expired. Another example is "Where's the Beef?", which grew so popular it was used in the 1984 presidential election by Walter Mondale. Another popular catch-phrase is "I've fallen and I can't get up", which still appears occasionally, over two decades after its first use. Some advertising agency executives have originated more than one enduring slogan, such as Mary Wells Lawrence, who is responsible for such famous slogans as "Raise your hand if you're Sure", "I♥New York" and "Trust the Midas touch."

Question: What two traits are very important for television advertisements?
striking and memorable