Skyscraper Ad

A skyscraper ad is a banner ad in a tall, narrow vertical shape — named for its resemblance to a skyscraper building — typically placed along the side of a web page. It's one of the standard display ad formats defined by the IAB, with common dimensions like the skyscraper (120×600) and the wide skyscraper (160×600). As a vertical unit running down a page's sidebar, it occupies space alongside the main content rather than within or above it.

The skyscraper is one of the workhorse standard banner sizes, alongside formats like the leaderboard (a wide horizontal banner at the top) and the medium rectangle (an in-content square). Each standard size suits different placements: leaderboards span the top, rectangles sit within content, and skyscrapers run down the sides. Because it's a standard size, the skyscraper can be served across countless sites and ad systems automatically, like other banner formats — its distinguishing feature is simply its tall, vertical, sidebar-suited shape.

The skyscraper's tall vertical shape gives it a specific strength: sustained visibility as the user scrolls. Because it runs down the side of the page, a skyscraper can remain in view longer than a top banner the reader scrolls past — especially if it's a sticky unit that stays fixed while the content scrolls. Its height also gives it more room for a message than a short banner. This makes the skyscraper useful for keeping a brand or offer visible alongside the content a reader is engaged with.

Like all standard banners, though, the skyscraper is subject to the realities of display advertising — banner blindness (sidebars are a place readers learn to ignore), viewability concerns (a tall ad partly below the fold may not be fully viewable), and the format's general suitability for awareness and retargeting over direct response. Its vertical, sidebar placement is both its advantage (sustained side-of-content presence) and its challenge (sidebars are easy to tune out). The shape is a tool whose value depends on creative, placement, and viewability.

Using skyscraper ads well means leveraging the vertical format's strengths — sustained visibility alongside content, room for a clear message — with strong, simple creative designed for the tall shape, ideally in viewable, sticky placements that stay in view as the reader scrolls. Like other banners, skyscrapers work best for awareness, brand presence, and retargeting, with viewability and frequency discipline and relevant, brand-safe placement, and creative that earns attention despite sidebar banner blindness.

The failures are weak creative that the sidebar's banner blindness ignores, non-viewable placements (a tall ad mostly below the fold), and expecting a side banner to drive direct response it's poorly suited for. The discipline is to use the skyscraper for sustained, viewable brand presence alongside content with clear creative — playing to the vertical format's strength of staying in view — within the same viewability, frequency, and brand-safety discipline that good display advertising requires.

The skyscraper ad — a tall, narrow vertical banner — is a standard IAB display format suited to sidebar placement, valued for the sustained visibility its height provides as readers scroll.

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