Most broadband issues start because the connection isn’t fast enough nor reliable. If you are experiencing issues the first thing to dry is to run a cable from your computer to the router and disable wireless on your computer. If that makes the problem go away then you know that the issue is your WiFi signal, if not you need to look closer at your Broadband. In most cases it is not feasible to leave a cable constantly plugged into the machine but the WiFi can be worked on.
Assuming that the speed of your line is sufficient there are a few things to consider. One is the router itself. Most people stick with the same router for years even though they have switched provider or contract as they don’t want the hassle of changing passwords etc. Every time you upgrade it is worth upgrading to the latest router so you are benefitting from the latest Technology including WiFi 6 (as long as your tech supports it).
A solution that many people go for are extenders but these tend to take an already weak signal and just repeat it. The best solution is a mesh router solution. If you can then there is actually no substitute to having an ethernet plugged in direct to your router you will get a much better connection.
If you have tried all the above and nothing has helped then a line upgrade may be the ultimate solution. The cost of this depends on the provider you go with but don’t forget you will have a monthly fee as well as the installation fee.