This page gives you some sample wording for your LinkedIn page;

The Association of Professional Sales (APS) has been developed by practising sales leaders in response to a clear set of needs. Our collaborative philosophy brings together sales leaders, professionals and academics at the forefront of the sales profession, all passionate about the recognition of sales and its development.
We recognise the need for the sales profession to have a body that has credibility amongst senior practitioners to represent the profession to UK Plc, Government, Business and Consumer levels, and leading the thinking of Ethics, Standards and their implementation.
We also aim to develop the understanding of sales and creating a destination for those unaware of sales as a career option.