There are approximately 8-24 types of inuksuit (inuksuks). They have got different shapes and different sizes. And they are used for different aims. The inuksuk may have been used for navigation, as a point of reference, a marker for travel routes, fishing places, camps, hunting grounds, places of veneration, drift fences used in hunting or to mark a food cache. Some people even say that inuksuit (inuksuks) are also used by angakkoqs (shamans) for shamanic aims and shamanic ceremonies.
Historically, the most common types of inuksuk are built with a stone placed upon stone, and the simplest type of which is a single stone positioned in an upright manner.
Inuksuk (a.k.a. inukhuk, iñuksuk, inussuk, inukshuk) - in Inuit languages "inuk" means "a human" and "-suk" means "similar" or "something which is like something".
An inuksuk is a human-made stone landmark or cairn used by the Inuit peoples. These structures are found from Alaska to Greenland. The word inuksuk means "that which acts in the capacity of a human."
Nalunaikkutaq (it literally means "deconfuser" or "something that points to some important place") is a stone construction made of a single upright huge stone placed on its end. They were used by Inuit as a notable sign or landmark for some important place. Usually, it was used as a pointer for Inuit.
Inuksuk ("something which is a likeness of a human") is traditionally a column built from small flat stones. They have clearly been used as message centres in addition to their original purpose. It was a simple construction showing a human. You can find an arrangement of stones at their base left by a hunter for a follower.
Inuksummarik or inuksukjuaq ("something which is very big and looks like a human") is an inuksuk constructed of boulders tends to be massive because of its base-to-height ratio, often constructed to serve as important directional aids. It is noted for its larger than average size. Easily seen from a distance, these large inuksuit act as major coordination points.
Nowadays all kinds of Inuit stone constructions are conventionally called "inuksuk" because for tourists and all the people who are interested in Inuit culture it is easy to understand it and remember the word. But actually, every type of an "inuksuk" has got its own name, meaning and purposes.
Tikkuuti ("something which is enough visible" or "viewer") is usually a rock built from small flat stones. They are pointers of different sizes and shapes. Tikkuuti can appear as triangular-shaped rock lying flat on the ground or as simple but useful arrangements of rocks appearing in a straight line, with the largest rock at one end grading down to the smallest at the other end, indicating the direction to be taken.
Inunnguaq ("something which looks like a human with legs, arms and head") is a construction built from different stones in a form of a human. They have legs, hands, a head, a neck and etc. These constructions usually have shamanic meaning and can be used as a symbol of spirits. Inunnguaq is more familiar to many people because it can be bought in Inuit souvenir shops, it can be seen in different Inuit books, it can be seen as a part of Inuit ornament and etc.
Niungvaliruluit is constructed with a "window" through which one can align with another inuksuk and thus project a sightline to a place below the horizon. Such an inuksuk, even when aligned to point the way to a mid-winter constellation, may not have served a strictly utilitarian purpose. After all, experienced hunters knew the direction of such places. Rather, as Inuit elder Osutsiak once explained, alignments were often constructed by those who felt the need "to attach their thoughts" to distant and familiar places, especially when they were a long way from home.