There are many different tools that you can use to come up with search engine keywords to help find the best keywords to help your purpose
. Perhaps the most well known is Google's own, free tool. When you are starting a process of discovery and optimization, one of the main keyword research tips to bear in mind is that you should almost always aim for a "long tail" word, or a more descriptive version, specifically highlighting your niche. You might find it very difficult to rank for the word "dog," for example and might be much better off optimizing for something like "golden retriever training," instead!