No effect on my page with php 7.0.9

Just you need to enable gzip. Your system is Nginx so you should enable gzip manually. Please take a look at the following url please.

https://www.wpfastestcache.com/tutorial/how-to-enable-gzip-on-nginx/

awesome it works now!

I did a page speed test with google pagespeed and gtmetrix and the results are a little better with the plugin and I was wondering, how much more improvement the “pro” version actually has compared to the free version of the plugin?
Is there any way to try it out on one of our pages, so that I can decide whether to buy it or not?

I just saw: 30 days money back gurantee. Will buy it and test it out! Thanks in advance ??

Can I use it on more than 1 sites? How much would a multi page version / license cost?

GT Metrix gives me this C Grade for Cache Validator, is there any setting within the plugin, that I have to activate in order to get this fixed?

Specify a cache validator
C (71) Server High

The following resources are missing a cache validator. Resources that do not specify a cache validator cannot be refreshed efficiently. Specify a Last-Modified or ETag header to enable cache validation for the following resources:

    https://fonts.googleapis.com/css?family=Open+Sans%3A400italic%2C600italic%2C700italic%2C400%2C300%2C600%2C700&subset=latin%2Clatin-ext&ver=4.6.1
    https://fonts.googleapis.com/css?family=Roboto:300,400,500,700
    https://maps.googleapis.com/maps/api/js/GeocodeService.Search?4sHundeschule%20Instinkt%20Am%20Hilligbornfeld%2010%20a%2006386%20Gro%C3%9Fpaschleben&7sUS&9sen-US&key=AIzaSyCqyMpI8rfRlo72mSnKgIPgmNO5nbYHGGg&callback=_xdc_._bfq4ks&token=36991
    https://maps.googleapis.com/maps/api/js/StaticMapService.GetMapImage?1m2&1i1117945&2i694846&2e1&3u13&4m2&1u296&2u300&5m5&1e0&5sen-US&6sus&10b1&12b1&token=65568
    https://maps.googleapis.com/maps/api/js/StaticMapService.GetMapImage?1m2&1i1925993&2i1262052&2e1&3u13&4m2&1u296&2u300&5m5&1e0&5sen-US&6sus&10b1&12b1&token=68091
    https://maps.googleapis.com/maps/api/js?v=3.exp&callback=Themify.MapCallback&key=AIzaSyCqyMpI8rfRlo72mSnKgIPgmNO5nbYHGGg
    https://maps.googleapis.com/maps/vt?pb=!1m4!1m3!1i13!2i4366!3i2714!1m4!1m3!1i13!2i4366!3i2715!1m4!1m3!1i13!2i4367!3i2714!1m4!1m3!1i13!2i4367!3i2715!1m4!1m3!1i13!2i4368!3i2714!1m4!1m3!1i13!2i4368!3i2715!2m3!1e0!2sm!3i365035102!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e3!12m1!5b1&callback=_xdc_._iqjzmx&token=75470
    https://maps.googleapis.com/maps/vt?pb=!1m4!1m3!1i13!2i4366!3i2714!1m4!1m3!1i13!2i4366!3i2715!1m4!1m3!1i13!2i4367!3i2714!1m4!1m3!1i13!2i4367!3i2715!1m4!1m3!1i13!2i4368!3i2714!1m4!1m3!1i13!2i4368!3i2715!2m3!1e0!2sm!3i365035341!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e3!12m1!5b1&callback=_xdc_._5rin3j&token=46627
    https://maps.googleapis.com/maps/vt?pb=!1m5!1m4!1i13!2i4366!3i2714!4i256!2m3!1e0!2sm!3i365034333!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0&token=126922
    https://maps.googleapis.com/maps/vt?pb=!1m5!1m4!1i13!2i4366!3i2715!4i256!2m3!1e0!2sm!3i365034333!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0&token=31872
    https://maps.googleapis.com/maps/vt?pb=!1m5!1m4!1i13!2i4367!3i2714!4i256!2m3!1e0!2sm!3i365034333!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0&token=73379
    https://maps.googleapis.com/maps/vt?pb=!1m5!1m4!1i13!2i4367!3i2715!4i256!2m3!1e0!2sm!3i365034333!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0&token=109400
    https://maps.googleapis.com/maps/vt?pb=!1m5!1m4!1i13!2i4368!3i2714!4i256!2m3!1e0!2sm!3i365034333!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0&token=19836
    https://maps.googleapis.com/maps/vt?pb=!1m5!1m4!1i13!2i4368!3i2715!4i256!2m3!1e0!2sm!3i365034333!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0&token=55857

• This reply was modified 8 years, 5 months ago by Steven Stern (sterndata).
• This reply was modified 8 years, 5 months ago by Steven Stern (sterndata). Reason: put code in backticks