We know that English is the language most used by companies and agents that operate internationally. This is not only true for those who work within an area in English-speaking countries, but also for all those who have contact with other countries and use English as a lingua franca to communicate or manipulate documentation that uses specific vocabulary in this language internationally. Therefore, it is not only important to know general English but also to know the English that is used specifically in the context of business. Having a good level of business English can have a very positive impact on a professional career, whether you are a beginner or want to deepen your knowledge. English for business, it is considered as a separate branch within the study of the English language because it uses a specialized vocabulary and in order to successfully develop a career in the international environment, it is not only necessary to have a good level of general English, but also to know in depth the particularities of commercial English. It is important to master both written communication and oral communication, as we will have to be able to write and answer letters and emails, make and answer phone calls, attend meetings, give presentations, understand the documentation presented to us, etc. In order to follow a simple conversation, it is necessary to know the basic rules of English grammar, both orally and in writing, and to have a relatively broad vocabulary. Knowing English for business would help to highlight the competencies that can be applied in the workplace, especially in the vocabulary that can be found during a telephone conversation, a negotiation, a meeting, etc., and also in general topics related to business relationships on an international scale.