Wiki links are the internal links that connect the files in your knowledge base.
To create a wiki link use [[ and type the name of another file in your repo, for example [[graph-visualization]]
You can also create a [[placeholder]]. A placeholder is a wiki link that doesn’t have a target file and a link to a placeholder is styled differently so you can easily tell them apart. They can still be helpful to highlight connections.
Open the graph with Foam: Show Graph command, and look at the placeholder node.
Remember, with CTRL/CMD+click on a wikilink you can navigate to the note, or create it (if the link is a placeholder).
Rendering context...
Feel free to use [[[[backlinks]]]], [[wikilinks]], [[edges]], [[multilinks]], or [[whatever the fuck you want to call it]] anywhere when talking to me in reference to something on the [[anagora]] or otherwise, my browser will resolve wikilinks in the default order, aside from duckduckgo as the 3rd step for unprefixed.
What?! [[Wikilinks Everywhere]], enjoy π₯°!

Wikilinks were pioneered by earlier internet wikis to make it easier to write links across pages without needing to write Markdown or HTML links each time.
Quartz supports Wikilinks by default and these links are resolved by Quartz using the [[CrawlLinks]] plugin. See the Obsidian Help page on Internal Links for more information on Wikilink syntax.
This is enabled as a part of [[Obsidian compatibility]] and can be configured and enabled/disabled from that plugin.
[[Path to file]]: produces a link to Path to file.md (or Path-to-file.md) with the text Path to file[[Path to file | Here's the title override]]: produces a link to Path to file.md with the text Here's the title override[[Path to file#Anchor]]: produces a link to the anchor Anchor in the file Path to file.md[[Path to file#^block-ref]]: produces a link to the specific block block-ref in the file Path to file.md<a href="/raw/garden/matthieuG/Path to image"><img class="image-embed" src="/raw/garden/matthieuG/Path to image"></img><p class="obsidian-embed"></a>β₯
[[Path to image]]</p>: embeds an image into the page<a href="/raw/garden/matthieuG/Path to image|100x145"><img class="image-embed" src="/raw/garden/matthieuG/Path to image|100x145"></img><p class="obsidian-embed"></a>β₯
[[Path to image|100x145]]</p>: embeds an image into the page with dimensions 100px by 145px<a href="/raw/garden/matthieuG/Path to file"><img class="image-embed" src="/raw/garden/matthieuG/Path to file"></img><p class="obsidian-embed"></a>β₯
[[Path to file]]</p>: transclude an entire page<a href="/raw/garden/matthieuG/Path to file#Anchor"><img class="image-embed" src="/raw/garden/matthieuG/Path to file#Anchor"></img><p class="obsidian-embed"></a>β₯
[[Path to file#Anchor]]</p>: transclude everything under the header Anchor<a href="/raw/garden/matthieuG/Path to file#^b15695"><img class="image-embed" src="/raw/garden/matthieuG/Path to file#^b15695"></img><p class="obsidian-embed"></a>β₯
[[Path to file#^b15695]]</p>: transclude block with ID ^b15695[[agora bot]] is now fully back to Twitter! That means if you follow @an_agora and then use [[wikilinks]], you don’t need to keep at-mentioning the bot; they should see your post in their timeline and react to it within a few minutes. https://t.co/YH4g4KcyCZ