File sizes and loading phases: Difference between revisions

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When the LEAN guidelines and the New Ad Portfolio were published by the IAB Tech Lab, the concept of initial load/subload was introduced to replace the previous “polite download”. This concept provides for the division of the total file size into an initial and a subsequently loaded part. Loading of the advertising content is initially limited to the initial part in order to optimise the loading times of the webpages and to boost user awareness. The individual specifications define which ad formats permit a subload. '''Initial file load is obligatory for all ad formats.'''