Process
These are not my favourite banners I designed or anything, but they are ones that I ended up recording the creation of and therefore showcase my process.
Made in Adobe Photoshop Elements CS6 with a Wacom Bamboo tablet model CTH-460.
Back when I was a famous book reviewer (shoutout to my 1000 followers), for every first volume of a manga I would review, I would also edit together a quick little banner to go at the top of the review. These would often consist of the logo, plus the text "Review by Elzburg" which I usually tried to match with the logo. Then I would carefully choose comic panel(s) and/or promo art to design the composition. Backgrounds were usually inspired by the manga's branding in some way.