Which of the following represents a phrase match keyword?

A phrase match keyword is indicated by enclosing the keyword in quotation marks. This means that when using a phrase match in a digital marketing context, search engines will look for searches that include the exact phrase as it is written, along with any other words that may come before or after it. In this instance, "smart tv" will match searches that contain that specific phrase, even if other words are present.

Using quotation marks ensures that the keyword "smart tv" is treated as a complete phrase. For example, it might match searches like "buy smart tv", "smart tv deals", or "where to get a smart tv". It's a way to refine targeting to ensure ads are shown to users who are searching for that particular phrase rather than just any combination of the two words.

The other options represent different types of keyword matches. A plus sign or a negative sign before the keyword suggests other match types, while square brackets indicate exact match keywords, which only match the search if it is an exact match without any additional words. Thus, using quotation marks is the correct way to specify a phrase match keyword.