Connecting a device to an ethernet cable won’t slow down the rest of the devices using wifi. Actually this can help pick up your wifi speeds because you have one less device connected to your home’s wifi. It should improve the internet speed and reliability of the devices connected without slowing down your wifi connection.
However, it all depends on the bandwidth capabilities of your home network and how many devices are connected at any given time. Multiple users all trying to access the internet at one time for varying reasons can impact your bandwidth and slow down your speeds.
Every household can benefit from using a combination of both a wired and wireless connection. Devices that require more bandwidth, such as a gaming console or smart TV, should be plugged directly into the router for faster speeds. This will help devices that require more mobility or are located far from the router, like a tablet or mobile phone, to have more bandwidth on a wireless connection.
If you have a smart home or you don’t want to run an ethernet cable throughout your house, upgrade your internet plan to whole home wifi. Both a wired and wireless connection are only as good are your internet. Get the best internet plan for the fastest speeds.