To move or travel behind someone or something, often as a way of keeping up or staying in line. The tour guide asked the group to follow along as she led them through the museum.
To understand or keep track of a conversation, story, or set of instructions. I found it hard to follow along with the lecture because the professor was speaking too quickly.
To participate in an activity by doing the same actions as someone else, often in a guided manner. The children were excited to follow along with the dance instructor's moves during the class.