If you're using a laptop or desktop computer with a physical keyboard, you can very quickly bring up the search box from anywhere by double tapping your shift key. ⬆⬆
Tap the shift key twice, quickly, from any page.
The search box opens straight away, ready for you to type, with all of the top level categories listed below.
Not only can you use the search box to find products matching keywords, all of the top level categories are available for you to start browsing the category that interests you.
Start typing to see matching products, grouped by category. Matching articles are in the Articles tab.
If you don't have a physical keyboard, just tap the magnifying glass button 🔍 in the top right corner to open the search box.
The magnifying glass button in the top right corner of every page also opens the search box.