What is the significance of the title the chaser

The term Chaser is used by drinkers. It means a drink of something bland or sweet to follow-up a straight shot of something like whiskey, gin, rum or tequila. It is called a chaser because it is drunk quickly after the initial strong shot of liquor which has a high alcohol content. John Collier used the word in his title The Chaser because the story talks about the love potion. A man named Alan Austen wants to acquire a love potion from an obscure apothecary. It symbolizes what Alan is doing to Diana that is, he is chasing her love. A chaser is something you drink after drinking something else possibly something unpleasant. The life cleaner offers the inevitable chaser to the love potion Alan buys to make Diana love him. 

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.

a. to introduce the audience to important characters .

b. to inform the audience where the story takes place .

e. to lay out specific details about different plot points.