Real Optimisation Is A Skilled Job
Many people offer optimisation service at a cheaper price, but the truth is they are simply installing and configuring a few plugins. This is not true optimisation, and most of the time, when the server cache clears, you can be left with serious website errors.
You may not realise it at first as you will be looking at a version of your website that is locally cached on your computer. But new visitors will see the errors straight away, and this is when error reports will come in and you will realise that something must be wrong.
My service is different in that I use a myriad of techniques to optimise a website. I use a combination of plugins, custom code, and experience to ensure your website does not break. It can take many, many hours on some large websites with a lot of plugins to ensure everything is working exactly as expected. Everything is constantly server cache cleared during the process.