LiteSpeed Crawler is an integration of the LiteSpeed Cache plugin that can help speed up your website. The crawler goes through your website and updates the cached pages to reduce the waiting time for your visitors!
How does it work?
On a cached page without crawlers, visitors will do activities on the website and the entire process will be stored on the server for a certain period of time until the cache appears again - this can take a fairly high bandwidth and higher loading times.
In contrast, LiteSpeed cache crawler will readily know the running processes, so that the page does not need to be stored on the server and will be minimized. Thus, the cache will only display the most recent appearance on a website.
The LiteSpeed cache crawler contains several options that you will be able to manage from your WordPress administration panel. Just go to the LiteSpeed Cache plugin tab and click on Crawler - you will find the different tabs:
You can find out more about all of its possibilites in the official documentation.