Reading comprehension is the ability to process written text, understand its meaning, and to integrate with what the reader already knows. Reading comprehension relies on two abilities that are connected to each other: word reading and language comprehension. Comprehension specifically is a "creative, multifaceted process" that is dependent upon four language skills: phonology, syntax, semantics, and pragmatics. Reading comprehension is beyond basic literacy alone, which is the ability to decipher characters and words at all. The opposite of reading comprehension is called functional illiteracy. Reading comprehension occurs on a gradient or spectrum, rather than being yes/no (all-or-nothing). In education it is measured in standardized tests that report which percentile a reader's ability falls into, as compared with other readers' ability.

Some of the fundamental skills required in efficient reading comprehension are the ability to:

Comprehension skills that can be applied as well as taught to all reading situations include:

There are many reading strategies to use in improving reading comprehension and inferences, these include improving one's vocabulary, critical text analysis (intertextuality, actual events vs. narration of events, etc.), and practising deep reading. The ability to comprehend text is influenced by the readers' skills and their ability to process information. If word recognition is difficult, students tend to use too much of their processing capacity to read individual words which interferes with their ability to comprehend what is read.

Some people learn comprehension skills through education or instruction and others learn through direct experiences. Proficient reading depends on the ability to recognize words quickly and effortlessly. It is also determined by an individual's cognitive development, which is "the construction of thought processes".

There are specific characteristics that determine how successfully an individual will comprehend text, including prior knowledge about the subject, well-developed language, and the ability to make inferences from methodical questioning & monitoring comprehension like: "Why is this important?" and "Do I need to read the entire text?" are examples of passage questioning.

Instruction for comprehension strategy often involves initially aiding the students by social and imitation learning, wherein teachers explain genre styles and model both top-down and bottom-up strategies, and familiarize students with a required complexity of text comprehension. After the contiguity interface, the second stage involves the gradual release of responsibility wherein over time teachers give students individual responsibility for using the learned strategies independently with remedial instruction as required and this helps in error management.

The final stage involves leading the students to a self-regulated learning state with more and more practice and assessment, it leads to overlearning and the learned skills will become reflexive or "second nature". The teacher as reading instructor is a role model of a reader for students, demonstrating what it means to be an effective reader and the rewards of being one.