Advanced Snippet Expansion Preferences
Once you're up and running with snippet expansion, you can make a few additional changes if necessary, by clicking on the cog next to the "Automatically expand snippets by keyword" text in the top right.
In these advanced options, you'll find a few key settings; If you use certain apps where you'd prefer for Alfred not to expand, drop them in. By default, Alfred 3 and Alfred Preferences are listed here.
If you want Alfred to expand snippets regardless of where they are within a string of text, you can do so. You can also turn off the "purr" sound you near when expanding a snippet.
If, when expanding your keyword, you find that part of the keyword is still visible, or part of the snippet text is deleted, slow down the simulated key events.
This can occur in particular in non-native Mac apps, and simply adds an imperceptible delay between deleting the keyword and pasting the snippet, allowing slower apps to catch up.
You can also customise how and when Alfred should restore clipboard contents.