Which of the following represents a broad match keyword?

Broad match keywords are designed to capture a wide range of search queries related to the terms included in the keyword. In this case, "wall art" is correctly identified as a broad match keyword because it allows for variations in the order, inclusion of additional words, and related searches.

For instance, using "wall art" as a broad match could trigger ads to show for searches like "art for walls," “wall decor,” or “canvas prints for walls.” This broad scope helps advertisers reach a larger audience who might be interested in the general concept of wall art.

The other choices represent different types of keyword matching. The quotation marks around "wall art" indicate an exact match, which means ads would only appear for searches that include that exact phrase. The plus sign in "wall +art" signifies a modified broad match, which requires that "wall" and "art" appear in the search query, but they could be in any order or have additional words. The minus sign preceding "wall art" typically indicates a negative keyword, which would prevent ads from showing for searches that include that exact phrase or variations of it.