Pause and resume the download
Change the download region in Steam settings
Clear the Steam download cache
Limit or remove Steam bandwidth limits
Disable VPN or proxy
Close other apps using the internet
Restart Steam
Restart your PC
Use a wired Ethernet connection
Check router and modem performance
Temporarily disable firewall or antivirus restrictions
Make sure the game is not being installed to a slow drive
Free up disk space
Defragment an HDD if using one
Update network drivers
Update Steam
Change Steam’s download server during off-peak hours
Check if Steam servers are experiencing issues