The answer to this question will depend on your individual needs and preferences. Generally, it is beneficial to keep your blog and website together, as this allows for a more seamless user experience and allows for easier SEO optimization. However, if you find that your blog takes up a significant amount of space or content on your website, it may be beneficial to have a separate domain for your blog. Ultimately, the decision is up to you, and it may be helpful to consider your specific needs and goals before making a decision.