What to include in a Terms and Conditions agreement depends on your business, what you want to cover (rules and guidelines) and your website or mobile app functionalities (registered accounts, etc.)
A few examples:
The Intellectual Property disclosure will inform users that your website, logo and visuals and other content you created is your property and protected by copyright laws
A Termination clause will inform users that their accounts on your website (or their access to your website, if they don’t have an account) can be terminated in case of abuses
A Governing Law informs users which country’s laws governs the agreement. This is the country in which your company is headquartered or the country from which you operate your web site.
A Links To Other Web Sites clause informs users that you are not responsible for any third party web sites that you link to from your website, and that users are responsible for reading these third parties’ own Terms and Conditions or Privacy Policies.