ATG Search includes a System Default Term Weights set (one per language). You can construct your own weight set by importing this default set and adding to it, by building your own weight set from scratch, or by importing a weight set.
To add a weight set:
On the Search Workbench tab, select Term Weights from the Show menu.
Enter the name (required) and description (optional) for the weight set.
Select a language.
Click Create.
To add individual terms to the weight set, see Adding Terms to Weight Sets.