Learn Digital Marketing (Hindi) 10 Digital Courses in 1

A/B testing is a controlled experiment on a live audience: visitors are assigned at random to two or more versions of a page, an email or a feature, and the versions are compared on one pre-chosen outcome so that the difference can be attributed to the change rather than to who happened to see it.

Retargeting is advertising shown to people because of something they did before: visited a site, viewed a product, abandoned a basket or appeared on a customer list, with the ad platform recognising them later on other sites, in search results or in a video feed and serving an ad tied to that earlier action.

Content marketing is the practice of earning customers by publishing material they want for its own sake, guides, comparisons, tools, data, video, so that the people who need what a business sells find it, trust it and come back, instead of being interrupted by an advertisement.

Data governance is the set of decisions and responsibilities an organisation puts in place over its data: who owns each dataset, what each field means, who may read or change it, how long it is kept and how its quality is measured, recorded so that the answers do not depend on who is asked.

Data quality is the degree to which a dataset is fit for the purpose it is used for, assessed along named dimensions, whether the records are complete, unique, consistent, timely, valid and accurate, and measured against the requirements of the decision the data supports rather than against an absolute standard.

Data modelling is the design of how data is structured for a given use: which entities are recorded, which attributes describe them, how the tables relate through keys, and, for analytical use, which table holds the measurements and which hold the context, decided before the data is loaded so that the questions the model must answer run correctly and fast.