The PubKitFolder snippet call goes on the page you are using for input of items in the relevant section. That page will be in a group accessible to the editor through group permissions.
The
&folder parameter indicates where the item is stored when it is created (on publish or preview). For the Technology section of your site, that would be 6. You’d probably create a child of 6 to act as a separate container so you can keep the items separate from the Genera/Mobile/Computers pages, so you’d use that document ID.
&postid indicates what page to load after publication. It would either be 6 or one of the sub-pages using an array of tag=>page pairs such as
&postid=`general 9,mobile 14,computer 15`. Your tags for the pages would be in a radio-button template variable, e.g. called techTags, with values for the options of Gen==general||Mob==mobile||Comp==computer. Your tag is referenced in the snippet call with
&tags=`techTags`.
The published pages would be 9, 14 and 15, each containing a Ditto call to round up items relevant to the subsection, filtered by tags.
[!Ditto? &parents=14 &tpl=`tech.tpl` &tagData=`techTags` &tags=`mobile`!]
You may want to have page 6 as an overview of all three, or may redirect to General if it is selected.
I’ve started setting up a structure like this for the news section of a demo site, hope things will be clearer when it is available.

KP