The first thing you can do is restart your modem and router. Disconnect the two devices fully. Wait a minute. Insert the modem back and allow the modem to restart completely. After that insert the router again. This move overcomes short-term problems that lead to low rates.
Then, simply plug in your computer to the modem with an ethernet cable. Check internet speed again. In case the speed increases considerably, you have an issue with your Wi-Fi. Place your router at an in-between position. Other electronics which interfere should be avoided, as well as the use of thick walls.
See the number of devices that connect to your network. Unplug unnecessary devices. View connected devices in your router settings. In case you detect unknown users, you should immediately change the Wi-Fi password. Congestion causes slow speeds.
Perform a stable high-speed internet connection test with ethernet. Compare your speeds of your plan against the speed of your results. Get in touch with your Internet Service Provider (ISP) in case speeds are slow over Ethernet. Report on your test. Ask them to check line fault issues or account situations.
Update firmware in your router via its setting. Old firmware slows down performance. Check your computer with malware. Malware may take up bandwidth. You can eliminate the threats you receive in your connection by use of reliable antivirus tools.
Conclusion:
First restart your equipment. Activate speed test via an Ethernet wire to find Wi-Fi errors. To eliminate illegal users and overload on networks. Test at speed go-directly. Use evidence and call your ISP when the wired connection is slow. Upgrade router firmware and scan the devices of malware. Insist your ISP fix the fault when problems are persistent.