A group is a collection of filters with conditions.
All the filters in a search can be compared to an if-statement. For example:
If a search only has these three filters, the comparable if-statement is (in pseudo code)
If(asset.asset_type is in the supplied list of asset types AND asset.assetid is in the supplied list of asset IDs AND asset.itemid is in the supplied list of item IDs) {
AddAssetToResults()
}
So, to reiterate, all filters have an "AND" relationship to every other filter.
Creating a Group is a way of having other Conditions in the "if-statement".
Here is an example of how to create a Group:
If we add this group to the filters used in the above example:
Then the if-statement will be
If(asset.asset_type is in the supplied list of asset types AND asset.assetid is in the supplied list of asset IDs AND asset.itemid is in the supplied list of item IDs AND (asset_detail.name equals the supplied name OR asset's keywords meta data has a keyword, which equals the supplied keyword)) {
AddAssetToResults()
}
The first filter in a group will always have an AND condition in relation to all other filters, but subsequent filters in the group can have other Conditions.
In conclusion: a group can be compared to parentheses in an if-statement.