Employment-based immigration refers to the process through which foreign nationals can obtain visas or permanent residency in a country based on job offers or employment opportunities. This type of immigration typically involves employers sponsoring workers to fill positions that cannot be easily filled by local labor. In the United States, for example, there are several categories of employment-based visas, such as the H-1B for skilled workers and the EB-5 for investors. These programs aim to attract talent and skills that contribute to the economy while ensuring that local job markets are not adversely affected.