I am not very good at this, I dont have ubuntu, I have windows 10. 

My site has hosting and I have cPanel.

I downloaded eAccelerator files. Do I use that?

Here is the errors:

Site optimization

PHP:

• PHP accelerator = - WARNING (The script can be much faster if you install some PHP accelerator)
• PHP setup = litespeed - OK

MySQL:

• key_buffer_size = 134217728 - OK
• query_cache_limit = 1048576 - OK
• query_cache_size = 0 - FAIL (must be >= 16777216)
• query_cache_type = ON - OK
• max_heap_table_size = 16777216 - OK
• tmp_table_size = 16777216 - OK
• thread_cache_size = 0 - FAIL (must be > 0)

Web-server:

• User-side caching for static content - click here to check it in Google Page Speed
  If it is not enabled then please consider implement this optimization, since it improve perceived site speed and save the bandwidth, refer to this tutorial on how to do this.
  To apply this optimization you need to have expires_module - Array
• Server-side content compression - can be checked manually or in "Page Speed" tool build-in into browser.
  If it is not enabled then please consider implement this optimization, since it improve perceived site speed and save the bandwidth, refer to this tutorial on how to do this.
  To apply this optimization you need to have deflate_module - Array

UNA:

• DB cache = On (File based cache engine) - WARNING (installing PHP accelerator will speed-up file cache)
• Pages cache = On (File based cache engine) - WARNING (installing PHP accelerator will speed-up file cache)
• Page blocks cache = On (File based cache engine) - WARNING (installing PHP accelerator will speed-up file cache)
• Templates Cache = On (FileHtml based cache engine) - OK
• CSS files cache = On - OK
• JS files cache = On - OK
• Compression for CSS/JS cache = On - OK

Oh okay, I didn't know that.

Not sure, don't know how else I could fix this problem now... :(