Offer Details: Offer expires 9/30/2018 (midnight Pacific Time), and is available only to qualified advertisers who meet the following eligibility criteria: Open to new and verified Bing Webmaster Tools account holders who own their own Website and open a new Bing Ads account; a “new” account is one that has been open fewer than 30 days prior to the date of coupon redemption. Your account will be evaluated daily to verify you meet the eligibility criteria. When criteria is met, a Bing Ads coupon will be sent to each qualified advertiser by email in approximately 3 business days from date of verification. See full offer details here.
In a nutshell, Long Tail Pro helps you quickly find keywords in bulk based on a seed keyword that you input. In addition to returning hundreds of related keywords, the tool also shows search volume (monthly search volume), advertiser bid, number of words, rank value, and my favorite Keyword Competitiveness (helps you judge the competition and keyword difficulty).