An ecommerce design retainer can cover a broad range of services, with the exact scope agreed on before signing. Most retainers are built around a few common categories.

Storefront and UX design updates are usually the core of it: refreshing product page layouts, updating category pages, cleaning up navigation, and iterating on the checkout flow to lift conversion rates.

Promotion and campaign creative covers sale banners, homepage hero images, seasonal artwork, and limited-time offer visuals. This is where having a retained designer really pays off. Campaigns come up fast, and scrambling to find someone last-minute usually shows in the work.

Email marketing design is often bundled in too, including responsive templates for abandoned cart sequences, welcome flows, product launch announcements, and regular newsletter sends.

Paid advertising creative (display ads, Meta creatives, Google Shopping imagery, retargeting banners) needs constant refreshing because ad fatigue is real and it hits faster than most people expect. This tends to be one of the higher-volume items in any retainer.

More comprehensive packages from senior designers or agencies may also include conversion rate optimization (CRO) design, which means building A/B test variants of key pages rather than just making things look nicer. Some retainers also cover design system maintenance, keeping UI components, typography, and color usage consistent as the store grows and changes.

Whatever the mix ends up being, it should be spelled out clearly in the agreement before work starts. Vague retainer scopes are where most disputes come from.