How to optimize a site on Joomla?

Question

Joomla

https://schluesseldienst-berlin-24.de/ - there is a website,
Minimum rates 49 - pc 10 - mob.
I tried all the plugins to solve the problems that gps issues.
optimization is not improved

Answer 1

The first metric (problem) that you need to solve is the server response, 1600 ms is no good, it should be less than 300. To do this, you will most likely have to change the hosting to a more productive one, enable caching and more, answered about it here What cacher and optimizer Do you recommend Joomla?
Then look at how many points will increase, if you don’t have enough skills to edit the template with your hands, it might be worth changing the template and its manufacturer, I use yootheme.com myself, it gives out very decent indicators out of the box, 70-90 points without problems.
And one more thought, to check how with the optimization of competitors for your key query, it is enough to be a little better than their sites, excessive optimization is a resource cost that is not always justified.

Answer 2

Redo the template. Avoid whistles like MegaMenu if possible.