The difference between a literature review and an annotated bibliography is organisation. "Smith (2019) found… Jones (2020) found… Karki (2021) found…" is a list, and it is the single most common weakness in student literature chapters.
A review is organised by theme, synthesises across sources within each theme, and arrives at a gap that your research question then addresses. This tool gives you that structure, with the gap section positioned as the hinge between your review and your methodology.
Read enough to see the shape of the field, then group what you have found by what it says rather than by who said it. Each theme becomes a section, and within a section each paragraph should draw on more than one source. A paragraph citing a single study is a summary; a paragraph putting three studies in conversation is synthesis.
A practical test: if you could reorder your paragraphs without damaging the argument, you have a list. In a themed review, each section builds on the last and the order is doing work.
Conflicting findings are an opportunity, not a problem. Where two studies reach opposite conclusions, ask what differs: the population, the setting, the period, the measurement, the sample size. Explaining the conflict is exactly the kind of critical engagement that marks a strong review.
Sometimes the disagreement is your gap. If findings on a relationship split along lines nobody has examined, a study designed to test that dividing line has an obvious justification.
Critical reading means assessing how far a study's conclusions are supported: sample size and composition, whether the setting limits transferability, how variables were measured, how old the data is, and what the authors assumed without testing.
It does not mean disparaging published work. "This study is weak" is not analysis. "This finding rests on 40 respondents from a single institution, so it may not extend to larger or more varied settings" is — it says precisely what the limitation is and what follows from it.
The gap states plainly what is not yet known: an unstudied population, an untested relationship, an unexamined context, or contradictory findings nobody has reconciled. It must follow from the review you have just written — a gap that appears from nowhere reads as a justification invented after the fact.
Then show that your research question addresses precisely that gap. This is the hinge of the whole thesis: it connects the literature to your methodology and answers the examiner's question of why this study needed doing. Write it explicitly; do not leave the reader to infer it.
State your scope: which databases, which years, which languages, what you included and excluded. This makes your review auditable and pre-empts "why did you not cite X?" — if X falls outside a stated boundary, you have an answer.
Prefer peer-reviewed sources and recent work, except where a source is foundational and must be cited. Not everything you read belongs in the chapter: a review is an argument, and material that does not serve the argument should be cut however long you spent on it.
Around 25% of the total word count for a typical Master's thesis, though this varies by department. Check your own guidelines.
Enough to establish the themes and the gap convincingly — often 40 to 60 for a Master's thesis. Coverage of the field matters more than the raw count.
Thematically, in almost all cases. Chronological order only makes sense when the development of thinking over time is itself your subject.
The specific thing your review shows is not yet known, and which your study will address. It should emerge from the review rather than being asserted.
Yes where they are the appropriate source — government statistics, official reports, industry data. Do not let them substitute for peer-reviewed work on the theory.