Labour market information informs people about how the market is doing. For example, if your son/daughter is interested in working in IT, labour market information will inform them as to how the industry is progressing, the location of these businesses, the opportunities available in that area as well as past and future projections. It also informs people about what skills, qualities and qualifications are required to enter into that profession.
Below are some useful links regarding labour market information:
https://www.ons.gov.uk/employmentandlabourmarket
https://swlep.co.uk/programmes-swlep/careers-hub/careers-explorer