Choosing a college route allows you to continue your studies, specialising in a smaller number of subjects (or even just one). Like school, you will spend your time studying and learning new skills that can then take you in to employment or higher education. At College you would usually study A-levels or vocational qualifications up to level 3.
Choosing an apprenticeship route still means that you will continue your education and gain new qualifications but this will be done at the same time as working and earning a wage. There are lots of different career routes into apprenticeships available in a wide range of sectors.