You will find two kinds of links in the text of wiki cards. Internal links go between wiki cards. External links go to other places on the internet.
An internal link will look across many wiki sites to find a card named by an internal link.
Hover over an internal link to see what domains it will poll and in what order.
Hover over a page's flag to see where it is stored. Notice colored boarders indicating various sources.
An internal link might find that you've edited a card and have that card in your browser local storage. The link will show you that card instead of any other.
Hover over the card's flag to learn were it was found. Border colors are added to pages as follows: yellow for local storage, blue for remote sites, and, green for plugin documentation.
Internal links are always the title of the page they reference. This sometimes leads to awkward grammar but has the advantage of presenting meaningful names.
An external link is like most other links on the web. When you click the link you go to the referenced site and start browsing there. wikipedia
External links open the referenced page in a new browser tab so that lineup of cards is left undisturbed.
Convention has external links written as a single link word at the end of a paragraph. Link words like site, post, pdf and video make it clear what you will get. Well known sites like bbc and wikipedia make good link words too.
Other Things to Click
You can click a card to bring it fully into view. This makes the page the center of attention. You can choose a different center of attention using the left and right arrows on your keyboard.
Find The Beginning of a site to clear the lineup of cards.
Read History of revisions at the bottom of each card.