This week, I hope to add litespeed caching for guests. The main benefit is that it will be quick for visitors and Google will take that as a good signal and hopefully give us some love. Litespeed reduces the load on the mysql backend and so should have a small improvement in speed for logged in members, more so during busy times. Lots of guests, uncached, puts a high load on mysql, but litespeed caters to that. Litespeed is a kinda pricey subscription so I hope it proves worthwhile. I was in two minds over whether or not to have it, but I took the plunge.
Also, I will add a CDN, which is short for Content Delivery Network. This takes some of the elements on this site, like images, some javascript etc and puts them in what they call "PoPs", which are locations spread throughout the world. The idea is that if the main server is in the USA, someone from say the UK will have a slower website experience due to more data having to travel a further distance. So, a CDN will put some of that content locally.
The CDN service I intend to use has comprehensive coverage, with 39 PoPs throughout the world. Hopefully, this will help make a slight improvement to the speed of the site.