What is Broad Search ?
Broad Search is now one of the most popular in Google Adwords. Broad search is to find new keywords. For more details visit - webdesignfromscratch.com/seo/what-is-the-difference-between-broad-match-phrase-match-and-exact-match/
Broad match is the default match type that all your keywords are assigned if you don't specify another match type (exact match, phrase match, or negative match). Broad match helps you attract more visitors to your website, spend less time building keyword lists, and focus your spending on keywords that work.