Ask How does using broad match keywords in SEM affect cost per click?

[Dean101]

Using broad match keywords in SEM changes cost per click by widening the range of searches your ads can appear for. This usually increases impressions and competition in auctions, which can push CPC up or down depending on relevance and Quality Score. If the keywords are too broad, you may attract low-intent clicks that raise costs without improving conversions. However, smart use with negatives and strong ad relevance can keep CPC efficient.