In one sentence, describe what the following article is about:

If your family already has a family tree, take time to review it. Ask your family about people on the tree that you don't recognize, and about important life events like marriage and childbirth which shaped the tree. If you don’t have a family tree, work on a family tree (alone or with your family members) by gathering information and photos. Trace your ancestry by joining a genealogy project, visiting websites like ancestry.com, or getting DNA test to learn your exact ancestry. To make a family tree, you can draw a tree and extend a branch for each family member. Put their name and photo on that branch. Once you have learned what cultures are represented in your family tree, learn more about them. You may begin your research with a fair amount of prior knowledge, or you might know very little about what culture(s) you come from. Look online or at your local library for information about history, religion, dress, etiquette, and holidays. Talk to your family about ancestors that they remember. Ask them to share memories about your family members. If you have family that emigrated to the country you’re living in now, ask for them to share memories and details of their home country. Ask family about where they grew up, what kind of foods they made or make, holidays they celebrate, and what traditions they practice(d). Bring out photos that you have of family members. Ask your family to bring out old photos as well. Share them and talk about them. Ask about the people in the photos that you don’t recognize. If the photos aren’t organized, put them in a photo album to be reviewed in the future. You can also scan the photos to create a digital album. Visiting the gravestones of deceased family members may seem morbid, but it is a good way to see part of your family's history firsthand. If you know where your ancestors’ gravestones are located, visit them with family. Take photos of them, transcribe them, and document them for future generations.

Summary:
Review your  family tree. Research the culture represented in your family tree. Talk to relatives. Look at old photos. Go to the cemetery.