In the book An introduction to manifolds by Tu, Loring W, it defines the $k$-tensor as follows
Denote by $V^{k}=V \times \cdots \times V$ the Cartesian product of $k$ copies of a real vector space $V $. A function $f: V^{k} \rightarrow \mathbb{R}$ is $ k $-linear if it is linear in each of its $ k $ arguments: $$ f(\ldots, a v+b w, \ldots)=a f(\ldots, v, \ldots)+b f(\ldots, w, \ldots) $$ for all $ a, b \in \mathbb{R} $ and $ v, w \in V $. Instead of $2$-linear and $3 $-linear, it is customary to say "bilinear" and "trilinear." A $k $-linear function on $V$ is also called a $ k $-tensor on $ V $. We will denote the vector space of all $ k $-tensors on $ V $ by $ L_{k}(V) $. If $f $ is a $ k $ -tensor on $ V $, we also call $ k $ the degree of $ f $.
However in Wikipedia, it defines the $(p,q)$-tensor as follows
In this approach, a type $(p,q)$ tensor $T$ is defined as a multilinear map, $$ T: \underbrace{ V^* \times\dots\times V^*}_{p \text{ copies}} \times \underbrace{ V \times\dots\times V}_{q \text{ copies}} \rightarrow \mathbf{R}, $$ where $V^*$ is the corresponding dual space of covectors, which is linear in each of its arguments.
It is obvious that the definition of a $k$-tensor in An introduction to manifolds is just the $(0,q)$-tensors in the definition of Wikipedia.
My question is, why do not we define the tensors to be $(p,q)$-tensor in Tu, Loring W?
EDIT: I have noticed that there are no $(p,q)$-tensors in the whole book of Loring Tu.
Is it because that the elements from dual space will never be used in tensors in manifolds in the following study (so $p$ always equals to $0$)? If not, where do we use $(p,q)$-tensors in the study of manifolds? (maybe it will appear in tensor fields?)
I would really appreciate it if anyone could tell me the connections of these things.