Followers have flocked to the comments to express their gratitude for the "fabulous" tip.
One person said: "I do this! Fab tip!"
Gemma Bird's top tips for saving money on fashion and beauty
Another one added: "Shut up! How did I not know this? Bloody genius you are!"
A third person wrote: "What a money saver."
Someone else said: "Omg I did not know this feature!!How amazing."
The 40-year-old mum, who lives in Billericay, Essex, drives a Range Rover and jets off on multiple holidays a year to plush resorts in Mexico, Lapland and Dubai.
But she isn't an heiress or a lottery winner - no, she's achieved this comfortable life thanks to her saving skills.
Bird has previously shared how she lives mortgage-free in a four-bedroom detached house despite never earning more than £25k a year.
And how to halve your grocery bill with a few simple swaps as the mum-of-two never spends more than £60 a week on her shop.
More ways to save at Amazon
The is where returned goods are relisted to be resold with further reductions.
This is a great idea for shoppers who don't mind buying something pre-loved, but that's still in great condition.
A range of products are sold in the and you can find everything from kitchen appliances to laptops and lawnmowers.
We spotted a used Russell Hobbs steam iron selling for £16.82 in the Amazon Warehouse, which was labelled as "like new".
The same model was listed on the Russell Hobbs website for £24.99 reduced from its original price of £49.99.
The has hundreds of items that are surplus to requirements and being sold off at a substantial discount.
Unlike the warehouse, these items are brand new goods but just ones that Amazon or its partners want to move quickly.
All of the deals are for a limited time and you can search by category, price and discount.
The section is a great way to bag big discounts on previously owned products and handy for tech items such as phones, tablets and games consoles.
How to find gardening bargains
Doing up your garden to enjoy on warm and sunny days needn't cost the earth.
Sun Savers Editor Lana Clements explains how to get a top deal on items for the garden…
You can bag big savings on plants, shrubs and flowers, as well as gardening tools and furniture.
Many retailers have flash sales across entire seasonal ranges – often these promotions tie into payday at the end of the month or Bank Holiday weekends, so keep a lookout.
Sign up to mailing lists of your favourite brands and you’ll be first to know of special offers. It can be worth following retailers on social media too.
Use a price comparison site to search out the best value items.
And keep a close eye on the specialbuys at Aldi and middle of Lidl drops which drop a couple of times a week and usually mean great value seasonal items for your outdoor areas.
If you are not in a hurry to buy an item, try adding it to the shopping cart online and leaving it for a couple of days.
Sometimes big brands will try to tempt you into the sale by offering you a discount.
And always check if you can get cashback before paying.
It’s especially worth using sites such as Topcashback, Quidco and app Jamdoughnut when buying bigger ticket items such as garden furniture as you’ll get a nice kickback.
All of the items in the renewed section are pre-owned and refurbished items that have been professionally inspected and tested to meet quality standards.
Amazon has a special tab marked where shoppers can find different limited-time offers each day.
