The phrase "product line" refers to a group or collection of similar products made by a company. It can include different variations or versions of a product, catering to different customer needs or preferences. Full definition
The job description example given above can be used in creating the work history section of the resume for the post of product line manager. (jobdescriptionandresumeexamples.com)
It also launched a number of new product lines in a «grain - free» range. (afr.com)
Product Marketing Managers create and develop marketing strategies for product lines in support of established revenue, profit, and other goals. (jobhero.com)