The definition of an institution is an established custom or practice, or a group of people that was formed for a specific reason or a building that houses the group of people. Marriage is an example of a cultural institution.
Contextual targeting is a type of targeting on the Google Display Network in which you select specific keywords or topics and then allow AdWords to identify websites that are a good fit for your keywords and targets.
Contextualization is a useful tool when trying to identify the appropriate context(s) behind a communicative event. Viewing context as a process rather than as a static noun gives power to the producers of the communication to create, maintain, and change what contextual factors are relevant to them.