According to the official document, https://code.visualstudio.com/docs/languages/markdown
Snippets for Markdown
There are several built-in Markdown snippets included in VS Code - press Ctrl+Space (Trigger Suggest) and you get a context specific list of suggestions.
Does there any way, trigger snippet automatically when I type word, because it's troublesome, press Ctrl+Space
Trigger Suggestwith your own keybinding?