A high power wireless for Mac is required

Hello to everyone and a good day.
I come here with a small request. I recently bought a MacBook, but my Internet connection is really slow.
I have a router at home, maybe not a great one but it used to do the job.
Now with my new MacBook I was thinking that maybe a high power wireless for Mac is required.
Can you help me with this?
Any suggestions would be appreciated.
