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 ?
(7) It is recommended that irreversible hydrocolloid impressions be poured immediately or within a few minutes of removal from the mouth to prevent distortion.
Rudd7 in his study solutions of errors were described using a proper mix of irreversible hydrocolloid impression material.
Panzeri, Bacterial, fungal and yeast contamination in six brands of irreversible hydrocolloid impression materials, Braz Oral Res., 21(2), 106-11 (2007).
O'Sullivan, Disinfection procedures: Their efficacy and effect on dimensional accuracy and surface quality of an irreversible hydrocolloid impression material.
Vasudeva, The effect of pouring time on the dimensional accuracy of casts made from different irreversible hydrocolloid impression materials.