LiveReload monitors changes in the file system. As soon as you save a file, it is preprocessed as needed, and the browser is refreshed.
Even cooler, when you change a CSS file or an image, the browser is updated instantly without reloading the page.
from LiveReload official site
Packages > LiveReload > Toggle Serverto turn the server on. Or press
LiveReload: PORT_NUMBERtext appears in the status bar(see the bottom right panel in the following screenshot).
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.