EXAMPLE OF NAME:

If in CSS sheet I have:
p {
something;
}
then
<p>this stuff would have something; applied to it</p>

EXAMPLE OF CLASS:

If in CSS sheet I have:
.nameOFclass {
something;
}
then
<PAIREDtag class="nameOFclass"> blah blah </tag> would have something; applied to it

EXAMPLE OF ID:

If in CSS sheet I have:
#nameOFid {
something;
}
then
<SELF-CLOSINGtag id="nameOFid" /> would have something; applied to it