Understanding 'Resync Knowledge Base' Action with Dynamic URLs

I have a question about the 'resync knowledge base' action If i have a Lindy where it runs through a 'search KB' action (which uses a URL as its KB source), will the Lindy go and check the contents of that URL every time? For eg, if i run the lindy today, and then tomorrow add some new content to the webpage, and then run the lindy again tomorrow night, will the Lindy go and check the content of the URL again (and hence see the new content that got added), or will the Lindy recall the content from its last run (and hence not see any additional content added to the URL in the time since). Just unsure if i need to add a 'Resync KB' action before a 'search KB' action if I'm using a URL where the content on that webpage may change from time to time