1)Goto "Create content" -> "Wiki page". It will bring you a blank wiki page that you can create on.
2)Enter "IT Team" into the title. And fill up the rest of information, like description,..
3)In "Body", enter whatever you like. This will show up in the "IT Team" wiki page.
4)Save the wiki page.
5)The above steps will will a "IT Team" wiki page. The system will create an automatic URL pointing to this page. Please try to copy the URL so you can refer to this page.
6)On any other wiki pages that you want to have pointers to "IT Team". Please go to the pages and click on "Edit".
7)Once you are in the Edit mode, you could enter the text, e.g. "IT Team". Highlight the "IT Team" text and click on the "link icon" on the top of the editor. And you can enter the URL of the "IT Team".
8)Save the wiki page. And you should see the text of "IT Team" pointing to the "IT Team" wiki page.
9)Please note that the step #7 can be replaced by using wiki construct by entering "[[IT Team]]". The system will automatically find the Wiki page with the title "IT Team" for you.