Prepaid expenses and other current assets consisted of the following (in thousands):


	July 31, 2021		January 31, 2021


Other current assets	$	38,178	$	4,566
Prepaid marketing	23,104		10,852
Prepaid software licenses	17,785		20,596
Prepaid expenses	19,008		12,220
Prepaid hosting services	4,889		5,383
Prepaid expenses and other current assets	$	102,964	$	53,617

Property and equipment, net consisted of the following (in thousands):


	July 31, 2021		January 31, 2021


Data center and other computer equipment	$	175,359	$	146,220
Capitalized internal-use software and website development	54,839		44,358
Leasehold improvements	19,319		19,733
Purchased software	5,219		3,211
Furniture and equipment	6,469		6,498
Construction in process	67,602		35,528
	328,807		255,548
Less: Accumulated depreciation and amortization	(112,975)		(88,534)
Property and equipment, net	$	215,832	$	167,014

Construction in process primarily includes data center equipment purchased that has not yet been placed in service. As of July 31, 2021, $57.4 million of data center equipment was purchased but not yet been placed into service.

Depreciation and amortization expense of property and equipment was $12.7 million and $9.4 million during the three months ended July 31, 2021 and July 31, 2020, respectively, and $24.7 million and $17.6 million during the six months ended July 31, 2021 and July 31, 2020, respectively.

There was no impairment of website and internal-use software during the three and six months ended July 31, 2021 and July 31, 2020. The Company capitalized $7.6 million and $2.4 million in website and internal-use software during the three months ended July 31, 2021 and July 31, 2020, and $13.8 million and $4.7 million during the six months ended July 31, 2021 and July 31, 2020, respectively. Amortization expense associated with website and internal-use software totaled $2.8 million and $1.8 million during the three months ended July 31, 2021 and July 31, 2020, respectively, and $5.3 million and $3.7 million during the six months ended July 31, 2021 and July 31, 2020, respectively. The net book value of capitalized website and internal-use software was $28.8 million and $20.1 million as of July 31, 2021 and January 31, 2021, respectively.

Total intangible assets, net consisted of the following (dollar in thousands):


	July 31, 2021						Weighted-Average Remaining Useful Life
	Gross Carrying Amount		Accumulated Amortization		Net Amount
							(in months)
Developed technology	$	82,416	$	6,062	$	76,354	87
Customer relationships	9,084		1,215		7,869		77
Other acquired intangible assets	1,774		417		1,357		55
Total	$	93,274	$	7,694	$	85,580


	January 31, 2021						Weighted-Average Remaining Useful Life
	Gross Carrying Amount		Accumulated Amortization		Net Amount

							(in months)
Developed technology	$	14,513	$	2,193	$	12,320	56
Customer relationships	3,769		649		3,120		54
Other acquired intangible assets	399		162		237		185
Total	$	18,681	$	3,004	$	15,677

Amortization of developed technology, customer relationships, and other acquired intangible assets are recorded within cost of revenue, sales and marketing expense, and research and development expense, respectively, in the condensed consolidated statements of operations. Amortization expense of intangible assets was $3.3 million and $0.1 million during the three months ended July 31, 2021 and July 31, 2020, and $5.7 million and $0.2 million during the six months ended July 31, 2021 and July 31, 2020, respectively.

The estimated aggregate future amortization expense of intangible assets as of July 31, 2021 is as follows (in thousands):


	Total

Fiscal 2022 (remaining six months)	$	6,634
Fiscal 2023	13,199
Fiscal 2024	12,502
Fiscal 2025	12,418
Fiscal 2026	11,331
Thereafter	29,496
Total amortization expense	$	85,580

The developed technology, customer relationships, and other acquired intangible assets are amortized over their estimated useful lives, generally on a straight-line basis for periods ranging from 2 to 20 years.

Goodwill during the six months ended July 31, 2021 consisted of the following (in thousands):


	Amounts


Goodwill as of January 31, 2021	$	83,566
Goodwill acquired(1)	291,273
Foreign currency translation	(529)
Goodwill as of July 31, 2021	$	374,310

Accrued expenses consisted of the following (in thousands):


	July 31, 2021		January 31, 2021


Web hosting services	$	17,795	$	14,187
Other accrued expenses	14,671		11,372
Accrued interest expense	11,937		687
Accrued marketing	10,970		14,592
Accrued purchases of property and equipment	8,979		4,570
Accrued legal and accounting	5,810		5,709
Accrued expenses	$	70,162	$	51,117

Accrued payroll and benefits consisted of the following (in thousands):


	July 31, 2021		January 31, 2021


Accrued payroll and related expenses	$	40,694	$	16,528
Accrued commissions	32,588		32,300
Accrued bonuses	13,518		12,110
Employee Stock Purchase Plan	8,662		10,969
Accrued payroll and benefits	$	95,462	$	71,907

In April 2020, the Company began deferring payment on its share of payroll taxes owed, as permitted by the CARES Act through December 31, 2020. As of July 31, 2021 and January 31, 2021, the Company had deferred $5.1 million of payroll taxes in other current liabilities and $5.1 million of payroll taxes in other liabilities, noncurrent on the condensed consolidated balance sheet.