You can skim a passage to identify the topic and understand the writer’s main idea, or message. When you skim, you can also predict and guess.
What the reading is about?
1 )
skimming enables us to guess the name of the writer
2 )
by skimming we identify the writer's prediction
a useful tool for recognizing the subject of a text is skimming
4 )
we never understand the main idea of a passage by skimming