In above image you can see order lines with more then one sections. In Odoo standard functionality there is an options for add products at the end of the table or starting of the table only.

The Actual problem With this is if we have many products and sections and if we want to add product in perticular section then we must have to drag and drop that order line in perticular section

After installing this module, you can see in above image this module will add options for add product, add section and add note in each section and it will also consider record creating position in the table.

Let's assume the case: we have more then 50 order lines and all the order lines contains a perticular sections in the set of 10 records. and now we wants to add product under second section so we just click on add product under second, it will add line in that perticular section and you can directly save record there.