What is a .meta on NSS?

4

For example:

const auth = require('solid-auth-cli')
const file = 'https://jeffz.solid.community/public/likes.ttl.meta'

async function run(){
    await auth.login()
    await auth.fetch(file,{
        method:"PUT",
        body:"<> a <#test>.",
        contentType:"text/turtle"
    }).catch(e=>{console.log("Error : "+e)})
    let response = await auth.fetch(file).catch(e=>{console.log("Error : "+e)})
    console.log(response.status +" "+ response.statusText)
    console.log(await response.text())
}
run()
/* output :                                                                               
404 Not Found                                                                             
Trying to access metadata file as regular file                                            
*/