Tips: Get content from other team sites or whole site

We can use the webpart - Content Query Toll Part to collect most kinds of content from other team sites.

 

There are three options in Query part, "Show items from all sites in this site collection", "Show items from the following site and all subsites" and "Show items from the following". According to the descriptions, we get the content from different eara. 

 

And then there are List Type, Content Type, Audience Targeting and Additional Filters.