Impression

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Impression

A user's view of an online advertisement. Each time a website viewer sees an online ad, this is one impression. The more impressions an ad receives, the more likely it is that a user will click on it. Most online ads are sold by cost per thousand of impressions. See also: CPC.
References in periodicals archive ?
Schuster, Sodium hypochlorite disinfection of irreversible hydrocolloid impression material.
Frederick and Caputo [54] further showed that the putty and wash technique was significantly less accurate than polyether (heavy and light body) or reversible hydrocolloid impressions.
8) All materials tested in this study were able to maintain detail reproduction and gypsum compatibility after five days' storage time, but previous studies that evaluated the accuracy and dimensional stability of irreversible hydrocolloid impression materials have demonstrated the necessity of the immediate pouring of the material.
Vasudeva, The effect of pouring time on the dimensional accuracy of casts made from different irreversible hydrocolloid impression materials.