Follow the easy steps mentioned below to reduce lag on Roblox:
Other Ways to Eliminate or Reduce Lag in Roblox
Why is Roblox so Laggy?
Solutions
Why is Roblox laggy?
If you have a poor internet connection, it can affect your game. If your internet connection is lagging, unplug your modem or router and plug it back in to restart it. Then wait a few minutes for it to reboot.
Launch any Roblox game. To launch a Roblox game, go to https://www.roblox.com/home, and click any game on the page. This displays the game information page.
If you don't have the Roblox Player installed, a window will pop-up in the center of the screen. Click Download and Install Roblox in the center of the window to download the installer. Then click the install file to install the Roblox Player.
Set Graphics Mode to "Manual". Click the arrows next to "Graphics Mode" to toggle between "Automatic" and "Manual". When Graphics Mode is set to "Automatic", Roblox automatically optimizes the graphics quality for your computer. Setting it to "Manual" allows you to set the graphics quality yourself.
If you deleted them permanently using Garbage Bin, you need to reinstall Roblox Player.
Open the Roblox folder. Folders are listed in alphabetical order. When you locate the Roblox folder, double-click it to open it.
Upgrade your computer processor. Roblox recommends a computer processor that has a clock speed of 1.6 GHz or better and no older than 2005. You can install a new processor yourself, or hire a computer professional to install it for you.
Re-install Roblox: If an application doesn’t work correctly, we generally uninstall it and then re-install it . This helps in taking away the glitches that somehow happen while using the same.
To do so, download the resolution changer application and then open the same. Select the device template, click apply and confirm with YES.
Manual Graphics: For an enhanced game experience, you should change the Graphic Mode in Roblox from Automatic to Manual. To do so, start Roblox and click settings. There you will find the option to change the Graphic Mode from Automatic to Manual. Also, set the Graphics Quality to the lowest.
Roblox is an online game that lets you make different things graphically and sell the same.
You can fix that by going to the Control Panel and select Network and Internet. Then select Network Sharing and then Ethernet. Click on the properties, and then you need to put 8.8.8.8 in Prefered D NS and 8.8.4.4 in Alternate DNS.
Talking about Roblox, if your device isn’t powerful, you’ll feel the sluggish game.
System lag happens because of the slow or outdated graphic card on your device.