Visit Reviews & Guides and click the Write a guide link. You need to be signed in to eBay to write a guide.

Create a title for your guide. 
eBay users will see this title in the Reviews & Guides search results. Provide as much information as you can about the content of your guide in your title.

Write the guide text.
Write the main text of your guide. With the editing tool, you can change the appearance of the text, add bullet points, and more. Guides have a 20,000-character limit.
Note: Your character count includes text, links, pictures, and HTML formatting tags.

Add links to eBay searches and other eBay pages (optional).
For example, if you have written about vintage toys, you can add a link to an eBay search for vintage toys. See below about how to add a link.

Add pictures (optional). 
To upload pictures into your guide, click the Pictures link. Then browse to find the picture on your computer. Click the Insert Picture button. The picture will appear in the guide text box.

Enter tags. 
Tags are words related to your guide. They will help users find your guide when they search Reviews & Guides. Choose words that are important to your guide, such as a brand name, category name, material, time period, and so on. For example, a guide about vintage toy fire engines might include these tags: "toys", "vintage toys", "fire engines", "miniatures" and "metal". You can include up to five tags.

Save your work.

• Click the Save & Continue button.

• If you are finished creating your guide and want to publish it, verify that the categories where your guide will be stored are correct, then click the Submit Guide button. Your guide will be saved in My eBay and will appear in search results within 24-48 hours.

• If you do not want to publish your guide immediately, you can stop at this point and save your guide and work on it later.  To resume working on your guide, go to My eBay and click the Edit/Display link next to the draft guide you want to work on. Each version of your guide will be saved in My eBay.

On the Write a Guide page in the formatting toolbar, click Link.

If you want to add an eBay search, in the eBay search box enter the words used to run your search. For example, if you are writing wrote about vintage toys, you can add a link to an eBay search for vintage toys, "toy fire engine vintage".

If you want to add a link to an eBay page, enter the page’s web address (URL) in the eBay web page field. Use this choice to link to complex eBay searches, eBay Shops, your About Me page, and other Community pages.

In the Name of link field, enter the text that will represent the link in your guide. In this example, "Vintage Toy Fire Engines".

Click the Add Link button to add the link to your guide. You can add as many links as you want.