You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Pub

Context:
Pub names are used to identify and differentiate each pub. Modern names are sometimes a marketing ploy or attempt to create "brand awareness", frequently using a comic theme thought to be memorable, Slug and Lettuce for a pub chain being an example. Interesting origins are not confined to old or traditional names, however. Names and their origins can be broken up into a relatively small number of categories.

Question:
What is the purpose of a pub name?

to identify and differentiate each pub