What the meaning of 线上引流？ This is from here.

公司大力发展线上与线下相结合，共同为服务商引流销售。

I also have:

具体来说，就是线上选（手）机， 线下体验，或者说是线上引流、线下交易。

引流：依靠吸引力或重力从一个体腔或伤口抽取液体的行为、过程和办法 = drain or drainage (medicine)
Maybe they mean &quot;吸引 顾客 流量&quot; and they just left 2 thirds of the words out??
Or is there another explanation?
线上: online
引: attract guests
流: customer flow
线上引流: attract customer online with various strategy to increase customer flow