Sorry, this is an bad question. If you want ALL the steps, you need to include the model number of the router.
Some routers do not offer to let you hide the SSID. It makes almost zero difference to security and can mean that others do not detect the network and place their own network on the same channel. This will reduce the performance of both your WiFi and theirs.
A hidden SSID can still be found very easily by a hacker as your WiFi devices will be broadcasting it instead of the router.
Do not hide the SSID. If you want security use WPA2 encryption with a strong random pass phrase.
I hope this helps.
After hide your ssid just go to your phone wifi setting then add network and type your router ssid name and save. you can see your wireless router than enter password if you had given and connect it.
Log into the router as admin. In settings, hide the SSID.
If you want detailed instructions, you have to give a detailed question. We cannot guess what model of router you have,
OOOwwwwwww my eyes…..that nasty ugly photo……I'm sorry I am in such a state of pain I can't answer your question…..