We use captives in our search engine. Its one great tool for my team who are working on content creation. I like its feature which helps me with keyword selection. It provides some other features but I am not satisfied from them. It also provide more options when comparing with competitors so it is good for that matter. As we all know Google's updates often make changes in this product. So it will be better if you understand before using it to increase your ranking. Captive can improve SEO results by providing more relevant keywords to rank higher than others as per competition. It has improved traffic and leads generated over website.