The first option to access the various sources is the Search Verticals – so settings that enable users to search within defined areas. They provide a ready-made filter that users pre-define and configure at their own discretion.
There are a few standard Verticals that SharePoint provides out-of-the-box. They include the range Everything, which – as the name suggests – performs a complete search. You can also search for particular Persons. It follows, therefore, that you will have to restrict the search to the relevant name, function, email or skills. Conversations is another default option to find particular threads on SharePoint websites, but you can also select topical Videos. Be aware, though: the latter function only works in the Enterprise Edition.
You can also define your custom Search Verticals. This is a sensible option, for instance if you do not want to receive the contents of a relevant website directly together with the search results, and instead would like to export search results to a separate area. You can restrict these Search Verticals to certain sources. Afterwards you can apply the filters and show the source on your own display templates.
It is fairly easy to configure the Search Verticals. Either you go to Central Administration – the search service application – or you use the respective Search Center to define particular verticals for the relevant website. Search Verticals provide one option of bringing order to the various sources. It is also a good way for users to perform a targeted search if they are only looking for certain content.