Sequence analysis is a way of looking at a series of data points like numbers or letters and seeing if there is any pattern or meaning in them. For example, let's say you have the numbers 1, 4, 9, 16, 25 in a row. You might notice that each number is the square of the number before it - 1*1=1, then 2*2=4, 3*3=9 and so on. This is a type of pattern or sequence that you can analyze. Sequence analysis can help us to figure out trends or other patterns in data, which can be useful in many different fields.