Hello @barrera
Thank you for your inquiry and I am happy to assist you with this.
I’ve tested your website on Gtmetrix and as you already pointed out the “Add Expires headers” score in Yslow is 0. However, there is a perfectly simple explanation for that. All of those are external resources, meaning those resources are coming from another server. This being said W3 Total Cache does not have control over these files and neither can any other plugin by that matter. Simply, those files coming from Twitter, Google, Facebook, and external images are not on your server.
There are 20 static components without a far-future expiration date.
https://fonts.googleapis.com/css?family=Raleway%3A100%2C100italic%2C200%2C200italic%2C300%2C300italic%2C400%2C400italic%2C500%2C500italic%2C600%2C600italic%2C700%2C700italic%2C800%2C800italic%2C900%2C900italic%7CNunito%3A100%2C100italic%2C200%2C200italic%2C300%2C300italic%2C400%2C400italic%2C500%2C500italic%2C600%2C600italic%2C700%2C700italic%2C800%2C800italic%2C900%2C900italic&ver=5.4
https://lh3.ggpht.com/-ZtLmOh-f9Ds/AAAAAAAAAAI/AAAAAAAAAAA/QEPBc3b4HlA/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh5.ggpht.com/-jvIPc_3QbvI/AAAAAAAAAAI/AAAAAAAAAAA/eDyl7X-HxRk/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://www.googletagmanager.com/gtm.js?id=GTM-WPCRDJK
https://lh6.ggpht.com/-fW5KepjzUTo/AAAAAAAAAAI/AAAAAAAAAAA/sJ2qcQrPr4w/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh6.ggpht.com/-sUpIXs6qciE/AAAAAAAAAAI/AAAAAAAAAAA/twV1SOp09wM/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh5.ggpht.com/-7Xqqq3pUhG8/AAAAAAAAAAI/AAAAAAAAAAA/_ZTe668kQuY/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh6.ggpht.com/-J8q2WsCB7LY/AAAAAAAAAAI/AAAAAAAAAAA/BtOHITt-cKg/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh3.ggpht.com/-Waig8S6-_Jw/AAAAAAAAAAI/AAAAAAAAAAA/9Wl4x-Owj9k/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh6.ggpht.com/-ye9Gux1keag/AAAAAAAAAAI/AAAAAAAAAAA/HIeiwVPA-hQ/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://lh5.ggpht.com/-MRZDaFA5F64/AAAAAAAAAAI/AAAAAAAAAAA/cV_FPfNo-5Y/s128-c0x00000000-cc-rp-mo/photo.jpg?sz=100
https://apis.google.com/js/plusone.js?ver=5.4
https://platform.twitter.com/widgets.js?ver=5.4
https://platform.linkedin.com/in.js?ver=5.4
https://www.google-analytics.com/analytics.js
https://connect.facebook.net/en_US/fbevents.js
https://connect.facebook.net/en_GB/sdk/xfbml.customerchat.js
https://connect.facebook.net/signals/config/247495036430520?v=2.9.15&r=stable
https://www.facebook.com/tr/?id=247495036430520&ev=PageView&dl=https%3A%2F%2Fwww.easymoveservices.com.au%2F&rl=&if=false&ts=1587942355098&sw=1367&sh=863&v=2.9.15&r=stable&a=tmgoogletagmanager&ec=0&o=30&fbp=fb.2.1587942355095.1120850454&it=1587942354384&coo=false&rqm=GET
https://www.facebook.com/common/cavalry_endpoint.php?t_cstart=1587942357164&t_start=1587942357164&t_domcontent=1587942357172&t_layout=1587942357357&t_onload=1587942357357&t_paint=1587942357357&t_creport=1587942357357&t_tti=1587942357172&lid=6820160491572158134-0
I hope this explains the score 0 on Yslow.
Thank yoU!