If the policy you’re entering is not investment linked then either leave the “Investment” drop-down field empty or select “None”.
However many pension and savings type of policies may be linked to investment funds. If so, use the “Investment” drop-down at the bottom left of the screen to select the basic type of investment (e.g. “Unit-linked”), as shown below.

If you select any “Investment” option other than “None” then you’ll find the next screen that appears will ask for some investment details, as shown below.

For further information regarding investments, please refer to the following…
Investments, Updating (Before Valuation)
Investments, The Summary Fields
Investments, Income & Other Transactions
Investments, How Transactions Work
Investments, How Growth Is Calculated
Investments, Update Fund Prices
Investments, Comparative Graphs
Investments, Transfers & Switching