Phrases are a set of words together that makes sense or has a meaning. Once you start learning phrases, you realize that English is an easy language. Most of the phrases are easy and are used regularly. Some fixed or set phrases that you might come across are- in the meantime, during the day, sorry to trouble/ bother you, but… , etc. Such phrases will help you in and out. Learning them will make conversing easy for you. It also helps you put your point across the table easily.