Anchors tie an expression to something else. Such as the begining or end of a line

Metacharacter	Description
^	Anchors to the begining of a line. A caret by itself indicates a line begining which all lines have.
$	Dollar anchors to the end of a line.

Examples:

^Start will display all lines that begin with S followed by t followed by a followed by r followed by t regardless of what else is on the line. For example: will all be displayed with ^Start

• Start today
• Start living
• Start the car

end$ will display all lines that have e followed by n followed by d just before the end of the line. Regardless what else is on the line. will all be displayed with end$

• This is the end
• We are near the end
• Rear end
• Bookend

^line$ will display all lines that begin with l followed by i followed by n followed by e followed by an end of line. For example this regex ^line$ will not display it will only display the single word line on a line by itself.

• New line
• Biline
• This is the end of the line
• Don not cross the line