This is so general.
We don’t know your system specs. There’s not any magic power, that will boost your website, in case that for an example your origin server not able to handle requests.
I’ll drop an example here.
Let’s say that you’re running on a system (server) on a shared hosting plan, which is designed for 10-20k visits per month, with a low Mem Ram, and not enough CPU’s to handle all apps that installed on that server, while your website gets 50k or more per month, while you’re running a social campaign which can bring 200-500-100-k simultaneous users, or a post becomes Viral.
In computer science, the number of concurrent users for a resource in a location, with the location being a computing network or a single computer, refers to the total number of people simultaneously accessing or using the resource.
Well then you got a problem ( the example and the numbers are completely hypothetical ).
If you are not in place, to review your system (server), your website’s Performance, then you will need to hire someone to do it for you, and consult you how to proceed.Of course I am not telling that, to make the sweet eyes on you, but that’s how things work, in general.
When your car’s engine has a low performance, what is the first thing that comes on your mind?
We need to make sure, first, that your system you’re running on is capable to support, bring some numbers on the table, and we can help you for free.
Without knowing what is your hosting plan, the specs of your server, what plugins you’re running, what is the system load, what server you use, which theme, and I could write all day, but this is not a community that will solve your WordPress (or any other apps), this is a community which mostly trying to solve and consult about CloudFlare things.