Certified GKH Gardening Expert
While some varieties of thyme are used primarily in cooking, any variety can be used for flavoring (except perhaps the ones used in a footpath.) Some of the best for culinary uses are the German, French, and English Thymus vulgaris as well as the citrus scented thymes. Woolly thyme and creeping thyme are used primarily as an ornamental, between pavers. Yours looks like a prostrate variety.