Qué es la mejora del rendimiento y cómo aplicarla correctamente

#iguru_soc_icon_wrap_6ab07ec820542 a{ background: transparent; }#iguru_soc_icon_wrap_6ab07ec820542 a:hover{ background: transparent; border-color: #fba700; }#iguru_soc_icon_wrap_6ab07ec820542 a{ color: #fba700; }#iguru_soc_icon_wrap_6ab07ec820542 a:hover{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205821{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205821:hover{ color: #fba700; }.iguru_module_social #soc_icon_6ab07ec8205821{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6ab07ec8205821:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6ab07ec8205982{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205982:hover{ color: #fba700; }.iguru_module_social #soc_icon_6ab07ec8205982{ background: rgba(251,167,0,0.01); }.iguru_module_social #soc_icon_6ab07ec8205982:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6ab07ec8205a43{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205a43:hover{ color: #fba700; }.iguru_module_social #soc_icon_6ab07ec8205a43{ background: rgba(196,196,196,0.01); }.iguru_module_social #soc_icon_6ab07ec8205a43:hover{ background: rgba(196,196,196,0.01); }.iguru_module_social #soc_icon_6ab07ec8205af4{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205af4:hover{ color: #fba700; }.iguru_module_social #soc_icon_6ab07ec8205af4{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6ab07ec8205af4:hover{ background: rgba(255,46,46,0.01); }.iguru_module_social #soc_icon_6ab07ec8205ba5{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205ba5:hover{ color: #fba700; }.iguru_module_social #soc_icon_6ab07ec8205ba5{ background: rgba(255,242,242,0.01); }.iguru_module_social #soc_icon_6ab07ec8205ba5:hover{ background: rgba(255,244,244,0.01); }.iguru_module_social #soc_icon_6ab07ec8205c46{ color: #ffffff; }.iguru_module_social #soc_icon_6ab07ec8205c46:hover{ color: #fba700; }.iguru_module_social #soc_icon_6ab07ec8205c46{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_6ab07ec8205c46:hover{ background: rgba(255,255,255,0.01); }