7. File weight calculation: For calculating ad file weight, all files for the ad including those shared libraries not exempt by the publisher or ad server must be included as part of the maximum file weight calculation. File weights are calculated after files have been compressed into gzip format.
8. Initial Load K-Weight = All ad files + Non exempt shared libraries + max 50 KB for all exempt Shared Libraries Subload K-Weight= All ad files + all non exempt shared libraries. See LEAN user experience and load performance guidance for details on initial load, subload and shared libraries
9. User-initiated file size: Unlimited file size load is allowed after user-initiated interaction. Ad should be responsible about bandwidth and device capabilities while doing so. User initiation is the willful act of a user to engage with an ad. User interaction is discrete user action with the ad or its elements, e.g. click or tap or other complete and discrete gesture.
10. Static file weight and Static image size: Use Initial Max K-Weight guidance for static image only ads or backup file requirements.
Slow internet connection: For 3G (1.5 Mbps download speeds) or slower connections, the file weights should be 30% less than recommended. File sizes in this specification are defined for the creative assets and files required for creative rendering and management of the ad. Ad server files or other non-creative services files like measurement or verification must not be counted against ad K-weight.
11. Z-Index Definition The z-index property specifies the stack order of an element of content on a web page. Consideration of the z-element in page content design such as navigation, imagery, and ads is important for providing a seamless experience when page content overlaps (i.e. an expanding ad with a z-index that is lower [on the z-index scale] than navigational elements may give the appearance that page navigational elements are showing through the expanded portions of the ad).
12. Z-Index Range Use Recommendations The z-index represents layers of elements on a webpage. When ad elements and other page elements are layered incorrectly, proper display of either page content or ad content (or both) may be compromised. The accidental “collision” of competing elements on a webpage that share the same z-index value leads to a poor consumer experience, in the form of distorted or mangled images and text. Accordingly, the establishment of an industry accepted z-index hierarchy and associated numerical range is crucial to solving the occurrence of collisions. Please note that adoption of these new z-index guidelines by all publishers will take time. Creative designers are advised to consult directly with publishers for their individual z-index guidelines.
13. Horizontal ad types are ads with landscape layout i.e. larger width and smaller height aspects. They are expected to fit edge to edge of screen width OR margin to margin of content layout width. Typical placements are top or bottom of the screen and sometimes in middle of page sections
14. Vertical ad types are ads with portrait layout i.e. larger height and smaller width aspects. They are expected to fit edge to edge from top to bottom OR margin to margin vertically between page layout elements. Typical placements right or left edges of the screen or page layout
15. Tiles are usually rectangles or squares with very closely measured height and width aspects. Typical placements are tiles in grid layouts. Usually they are small to medium sized ad units
16. Display ad guidelines have been updated to incorporate the LEAN Principles of lightweight, encrypted, AdChoice supported, and non-invasive advertising. New ad units recognize consumer’s diverse media consumption specially with touch screen mobile devices and introduces flexible sizing of ads so they can adjust to device screen size and emphasizes mobile experience in interaction with ads. All guidance is based on HTML5 technology and has been derived based on industry surveys, user research, and testing.
17. Horizontal ad types are ads with landscape layout i.e. larger width and smaller height aspects. They are expected to fit edge to edge of screen width OR margin to margin of content layout width. Typical placements are top or bottom of the screen and sometimes in middle of page sections