These are the main purposes of abstract writing.

Screening Documents

The major aim of abstract is to provide key information on a longer paper to the reader in a short time. An abstract gives a chance to the readers for getting information about the paper or any other document. It gives knowledge about the main topic, objectives, procedure, results, conclusions, and recommendations. Abstract creates the ability to understand the document.  The abstract is an alternative of a paper and contains key points of a paper. A reader reads every important thing on paper in his first reading.

 Indexing Information

The other major aim of abstract writing is to give important database and knowledge to investigators, library staff, and individuals of the management group. Every information section gets help from abstracts for preparing their index system. Investigators of every field, use keywords within internet to get related information. Sometimes, abstracts save a lot of time and labor in selecting to the point database for research function. A researcher selects easily the topic or area of his own choice with the help of abstract and indexes.