Most frequestly asked question in HR interviews is "Tell us about yourself". A helpful question for both the inrerviewer and interviewee to set the tone for the entire discussion and in what direction the interview should proceed.
Ultimately, you'll want to be prepared to describe past roles, how those roles demonstrate your strengths, and what you want in a company and role moving forward. Additionally, make sure to include why you believe this role is a good match for your talents.
You might say something like, "Well, I graduated from ABC University in 2015. Since then, I've worked my way up at Company X, from an intern blogging on the content team to an Associate SEO Strategist. Along the way, I've learned I work best in collaboration with a team, as opposed to more solitary roles. As an SEO strategist, I've discovered I enjoy the analytical side of marketing, and possess strengths that allow me to excel in those types of roles -- in fact, as a result of my SEO efforts, traffic to our site has increased 13% over the past two years. I'm now looking for new challenges and believe your company, and this role, is a fantastic next step."