Information route flags

Hi, I’ve been trying to find information about route flags for a very long time.
but I didn’t find anything in the official documentation or on the forum.
I’ve researched the source code
and I think route flags don’t affect
anything nor the rule engine network stack
Please help

“routes”: [
{
“flags”: 0,
“metric”: 0,
“target”: “0.0.0.0/0”,
“via”: “192.168.0.1”
},
{
“flags”: 0,
“metric”: 0,
“target”: “192.168.0.0/23”,
“via”: null
}
],
“status”: “OK”,
“type”: “PRIVATE”