A hook is an easier way for developer to add custom functionality into WordPress themes and plugins.

Addonify Floating Cart has multiple hooks that theme author can use to modify plugin content on the fly.

Action hooks used for overriding floating cart parts:

'addonify_floating_cart_sidebar_cart_header' 
'addonify_floating_cart_sidebar_cart_shipping_bar'
'addonify_floating_cart_sidebar_cart_notice'
'addonify_floating_cart_sidebar_cart_body'
'addonify_floating_cart_sidebar_cart_footer'
'addonify_floating_cart_sidebar_cart_coupon'
'addonify_floating_cart_sidebar_cart_applied_coupons'
'addonify_floating_cart_cart_footer_button'

Action hooks used for overriding product parts:

'addonify_floating_cart_product_image'
'addonify_floating_cart_product_quantity_field'
'addonify_floating_cart_product_quantity_price'
'addonify_floating_cart_product_title'

Other filters and hooks are:

'addonify_floating_cart_click_to_apply_button_label'
'addonify_floating_cart_have_a_coupon_label'
'addonify_floating_cart_sub_total_label'
'addonify_floating_cart_discount_label'
'addonify_floating_cart_total_label'
'addonify_floating_cart_go_back_from_coupon_label'
'addonify_floating_cart_coupon_code_field_label'
'addonify_floating_cart_applied_coupon_label'

These hooks can be used to modify the content generated by the Addonify Floating Cart plugin.