Not only does trellising help to support tomato plants structurally, it also improves air circulation, reduces risk of disease, and keeps your garden neater!
https://extension.umn.edu/yard-and-garden-news/three-ways-trellis-tomatoes
One of the most common ways to trellis tomatoes is using a tomato cage. The links below provide some insight on choosing the right tomato cage, as well as pros and cons of this trellising method:
https://www.southernliving.com/how-to-use-tomato-cages-7495871
You can also trellis tomatoes using single posts. Make sure to use a sturdy post and secure your tomatoes as they grow. This article provides more information about how you can employ this simple trellising method in your garden.
In the Florida weave, or basket weave method, twine is strung along both sides of the tomato plant and is tied to stakes placed along the row. Check out this website to learn more about Florida weaving tomatoes.