Literature reviews are not in use gravely sometimes. But, they are a significant element of any dissertation writing, and can ruin overall idea if badly written. A lot of people have forever thought that dissertation is the synonym of a cemetery for young and struggling scholars. You will require to group jointly and compare and contrast the unreliable opinions of different writers on sure topics.
A literature review demonstrates to your reader that you are able to:
Understand and critically analyse the background research
Select and source the information that is necessary to develop a context for your research
Shows how your investigation relates to previous research
Reveals the contribution that your investigation makes to this field (fills a gap, or builds on existing research, for instance)
Provides evidence that may help explain your findings later
If you are doing a thesis, dissertation, or a long report it is likely that you will need to include a literature review. If you are doing a lab write-up or a shorter report, some background reading may be required to give context to your work, but this is usually included as an analysis in the introduction and discussion sections.
Some quality literature review sites would help you to come up with good literature review.